The Bending Light simulation (see FigureL20.4, p. 194) enables you to change the angle of incidence of a light ray that crosses the boundary between two transparent materials and then measure the angle of reflection and refraction.Simulation of image formation in concave and convex mirrors. Move the tip of the Object arrow or the point labeled focus. Move the arrow to the right side of the mirror to get a convex mirror. In this Interactive, learners can drag a candle to various positions in front of a curved mirror and quickly observe the characteristics of the images that are formed. It's that simple; no dripping candle wax, no mess to clean up, just pure physics. Now available with a Concept Checker. This is a simulation to illustrate the processes involved in the formation of images in plane mirrors. When the control points are visible, you can move the object (the blue arrow), the four points where the (blue) incident rays strike the mirror, as well as the two ends of the mirror itself.Founded in 2002 by Nobel Laureate Carl Wieman, the PhET Interactive Simulations project at the University of Colorado Boulder creates free interactive math and science simulations. PhET sims are based on extensive education <a {0}>research</a> and engage students through an intuitive, game-like environment where students learn through exploration and discovery.Reflection, refraction and diffraction are all boundary behaviors of waves associated with the bending of the path of a wave. The bending of the path is an observable behavior when the medium is a two- or three-dimensional medium. Reflection occurs when there is a bouncing off of a barrier. Reflection of waves off straight barriers follows the ...Bending of light Objective: The objectives of this lab activities are : To study the law of reflection and refraction of light using different media To study the phenomenon and condition of total internal reflection To observe the dispersion of light by prism and refraction of light by different kinds of lens Introduction: The law of reflection of light states that when light bounces off from ...This is a simple simulation showing the reflection and refraction of a ray of light as it attempts to move from one medium to another. Use the sliders to adjust the index of refraction of each of the two materials, as well as the angle of incidence (the angle between the incident ray of light and the normal to the surface).Then follow it up with the Concept Checkers: Our Refraction simulation is now available with two Concept Checkers - one focuses on refraction and the direction of bending; it complements Activity #1 (above). The other focuses on total internal reflection and the critical angle; it complements Activity #3 (above). Do the simulation.Seen by observer. Simulate the rays and images seen from some position. The blue circle is the observer. Any rays crossing it are considered to be "observed". The observer do not know where the rays actually begin, but may think they begin at some point (s) if they intersect there. The rays are shown in blue, and the point (s) in orange. In/Post-Class Activity, Bending Light, PhET. Description. This is a 60 to 90 min. worksheet related to the concept of refraction and reflection with conceptual questions and simulations activities. Students can observe, examine, explore and connect the simulations to the concepts and would have a better understanding of bending/refracting light ...Light from the sun for example is composed of 7 distinct colors of light, and white light can be created with just three colors; blue, green and red light. Test your understanding and self-check Open the full B end i ng Li g ht simulation 6.Join photographer Nicholas on his expedition to Antarctica to photograph the wildlife. In this simulation, you will learn about the wave-like behaviors of light. When light travels from one medium into another, the rays can reflect off of the surface. Depending on the angle and the media, the light can also refract. The Bending Light simulation (see FigureL20.4, p. 194) enables you to change the angle of incidence of a light ray that crosses the boundary between two transparent materials and then measure the angle of reflection and refraction. This pathway provides resources for understanding motion in one dimension. The fundamentals of vector and scalars are covered, and the key concepts of position, displacement, speed, velocity and acceleration are explained. The pathway concludes with a series of questions to test understanding of the topic. 6 Favorites. Explore bending of light between two media with different indices of refraction. See how changing from air to water to glass changes the bending angle. Play with prisms of different shapes and make rainbows.This is a simple simulation showing the reflection and refraction of a ray of light as it attempts to move from one medium to another. Use the sliders to adjust the index of refraction of each of the two materials, as well as the angle of incidence (the angle between the incident ray of light and the normal to the surface). Ellipse Reflection Model. Move the points. Adjust number of segments. Press Play. This is a computer model of how sound (or light, etc) reflects inside an ellipse. Points "F" and "G" are the focus points of the ellipse. Example: Stand at one focus point in an elliptical room. A friend could stand at the other focus point and whisper: you would ...Join photographer Nicholas on his expedition to Antarctica to photograph the wildlife. In this simulation, you will learn about the wave-like behaviors of light. When light travels from one medium into another, the rays can reflect off of the surface. Depending on the angle and the media, the light can also refract.The manner in which light is reflected from a surface depends on the surface’s smoothness. Light that is reflected from a rough, textured surface, such as paper, cloth, or unpolished wood, is reflected in many different directions, as shown in Fig 1(a). This type of reflection is called diffuse reflection.Jun 2, 2020 · This experiment contains two parts to be done, which are: Part I:This part defines the reflection and refraction laws of light and use Snell’s law to calculate the index of refraction of unknown material. Part II: This part defines the meaning of the critical angle and the total internal reflection and use the critical angle to calculate the ... Then follow it up with the Concept Checkers: Our Refraction simulation is now available with two Concept Checkers - one focuses on refraction and the direction of bending; it complements Activity #1 (above). The other focuses on total internal reflection and the critical angle; it complements Activity #3 (above). Do the simulation.Reflection of Light In this activity students will be exploring reflection of light in a plane mirror using the “Bending Light” PhET simulation. Open the simulation by clicking on the link: Learning Objectives By the end of these activities it is hoped that students will have an acquired the following skills: • Following explicit instructions to gain acquired knowledge • Understand ...Using the Interactive. The Plane Mirror Images Interactive is shown in the iFrame below. There is a small hot-spot in the lower-right corner of the iFrame. Dragging this hot-spot allows you to change the size of iFrame to whatever dimensions you prefer. Now available with Task Tracker compatibility. Learn more. You can explore the color appearance of a person and of the shadows creating by that person on a white screen with our Colored Shadows simulation. Filtering Away. A color filter is a transparent film that absorbs a range of wavelengths of light. Looking at the world through a color filter will change the color appearance of objects. May 1, 2014 · Students have the opportunity to experiment with total internal reflection and then derive and apply the formula for the critical angle: Duration 30 minutes: Answers Included No: Language English: Keywords Bending Light, Light, Reflection, Refraction, Total Internal Reflection: Simulation(s) Bending Light Regular and Diffused Reflection. The light gets reflected from the surfaces. Any surface which is polished or in other words is shiny always acts like a mirror. The observation of light bouncing off the surfaces is termed reflection. The light after reflection travels in the same medium from where the ray was incident on the surface.Lay the mirror flat on the table with the shiny side up. Hold the flashlight at an angle pointing down toward the mirror. Explain to students that the light will be reflected off the mirror. Their task is to use the construction paper to catch the reflected light in order to pinpoint exactly where it goes. The Plane Mirror Images simulation blends an interactive Tutorial with an interactive simulation. Students will learn about the law of reflection and how it can be used to determine the location and characteristics of an image formed by a plane mirror.The Plane Mirror Images simulation blends an interactive Tutorial with an interactive simulation. Students will learn about the law of reflection and how it can be used to determine the location and characteristics of an image formed by a plane mirror.Founded in 2002 by Nobel Laureate Carl Wieman, the PhET Interactive Simulations project at the University of Colorado Boulder creates free interactive math and science simulations. PhET sims are based on extensive education <a {0}>research</a> and engage students through an intuitive, game-like environment where students learn through exploration and discovery.Launch Interactive. Learners are encouraged to open the Interactive and Explore. An activity sheet is not needed for this Interactive. Our Who Can See Who? simulation is now available with a Concept Checker. Do the simulation. Then follow it up with the Concept Checker. Learners and Instructors may be interested in viewing the accompanying ...Reflection of light (and other forms of electromagnetic radiation) occurs when the waves encounter a surface or other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface. This tutorial explores the incident and reflected angles of a single light wave impacting on a smooth surface.The Bending Light simulation (see FigureL20.4, p. 194) enables you to change the angle of incidence of a light ray that crosses the boundary between two transparent materials and then measure the angle of reflection and refraction.https://phet.colorado.edu/sims/html/bending-light/latest/bending-light_en.htmlDec 20, 1997 · Reflection and Refraction of Light. A ray of light coming from the top left strikes the boundary surface of two media. (It is possible to choose the substances in both lists.) The medium which has the bigger index of refraction is painted blue, the other yellow. You can vary the incident ray with pressed mouse button. The angle of incidence in the water is approximately 39°. At this angle, the light refracts out of the water into the surrounding air bending away from the normal. The angle of refraction in the air is approximately 57°. These values for the angle of incidence and refraction are consistent with Snell's Law. Reflection from a Mirror. Update your browser! Adjust the angle of the mirror and see what happens to the reflected beam! Determine the angle when each observer can see the light. Simulation created Steven Sahyun, University of Wisconsin - Whitewater using code modified from Andrew Duffy's Friction on an incline simulator. December 19, 2018.How does a lens or mirror form an image? See how light rays are refracted by a lens or reflected by a mirror. Observe how the image changes when you adjust the focal length of the lens, move the object, or move the screen.This pathway provides resources for understanding motion in one dimension. The fundamentals of vector and scalars are covered, and the key concepts of position, displacement, speed, velocity and acceleration are explained. The pathway concludes with a series of questions to test understanding of the topic. 6 Favorites. Sep 10, 2018 · Reflection of light (and other forms of electromagnetic radiation) occurs when the waves encounter a surface or other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface. This tutorial explores the incident and reflected angles of a single light wave impacting on a smooth surface. Regular and Diffused Reflection. The light gets reflected from the surfaces. Any surface which is polished or in other words is shiny always acts like a mirror. The observation of light bouncing off the surfaces is termed reflection. The light after reflection travels in the same medium from where the ray was incident on the surface.Simulation of image formation in concave and convex mirrors. Move the tip of the Object arrow or the point labeled focus. Move the arrow to the right side of the mirror to get a convex mirror. Sep 10, 2018 · The reflection of light can be roughly categorized into two types of reflection: specular reflection is defined as light reflected from a smooth surface at a definite angle, and diffuse reflection, which is produced by rough surfaces that tend to reflect light in all directions (as illustrated in Figure 1). There are far more occurrences of ... Advanced Physics. Advanced Physics questions and answers. EXPERIMENT -5: GEOMETRICAL OPTICS USING PHET SIMULATIONS Rev 3-14-2020 OBJECTIVE To study the reflection of light on flat and curved surfaces, and refraction of light though different shapes, and to find the focal length of a convex lens. EQUIPMENT PhET simulation Bending Light: htts ...Refraction, or bending of the path of the waves, is accompanied by a change in speed and wavelength of the waves. So if the media (or its properties) are changed, the speed of the wave is changed. Thus, waves passing from one medium to another will undergo refraction. Refraction of sound waves is most evident in situations in which the sound ...The angle of incidence in the water is approximately 39°. At this angle, the light refracts out of the water into the surrounding air bending away from the normal. The angle of refraction in the air is approximately 57°. These values for the angle of incidence and refraction are consistent with Snell's Law.‪Bending Light‬ 1.1.29 - PhET Interactive Simulations Enhance productivity with 3DOptix, Optical design and Simulation software. Ray Optics describes light propagation in terms of “rays” and is commonly concerned with how light is propagated, reflected, and refracted and the formation of images. The “ray” in geometric optics is an abstraction, or “instrument”, which can be used to ... Science; Physics; Physics questions and answers; In this activity students will be exploring reflection of light in a plane mirror using the "Bending Light" PhET simulation.Description. Prism color dispersion, ala Pink Floyd. Move the white dot to change the orientation of the incident ray of white light. Use the sliders to adjust the index of refraction of the surrounding material (n1), the red light index of refraction of the prism (nred), and the percent difference between the index of refraction of the prism ...Welcome to Ray Optics Simulation. To add an optical component, select a tool and click the blank space. To load an example, please go to the Gallery page. File: Undo Redo Reset Save Open Export Get Link View Gallery. Tools: Ray Beam Point source Blockers Mirrors Glasses Ruler Protractor Detector Text Move view. View:Optics Bench. The Optics Bench Interactive provides a virtual optics bench for exploring the images formed by mirrors and lenses. The height of the object (either a candle, an arrow or a set of letters) can be easily adjusted. The focal length of the mirror or lens can also be changed.Three short virtual lab investigations. 1) Validating Snell's Law, 2) Describing the intensity of the reflected and refracted rays and 3) determining the refractive index of a mystery metal. Subject. Physics. Level. High School, Undergrad - Intro. Type. Guided Activity, Lab. Duration.Launch Interactive. Learners are encouraged to open the Interactive and Explore. An activity sheet is not needed for this Interactive. Our Who Can See Who? simulation is now available with a Concept Checker. Do the simulation. Then follow it up with the Concept Checker. Learners and Instructors may be interested in viewing the accompanying ...Convex Mirror Images. The Convex Mirror Image Formation Interactive provides learners with a virtual light box for exploring the reflection of light off convex mirrors and the manner in which such reflection leads to the formation of an image of a complex object. Learners tap on various points upon an object. A ray diagram is quickly ...The lighting simulation software is primarily used in illumination design to simulate and optimize light pipes, and light guides, and non-imaging lenses and mirrors. TracePro is also a powerful tool for analysis of aspects of imaging systems such as stray light analysis and polarization effects. With its full set of features, designers can ... lack of medium) for light, 𝑣<𝑐 for anything that isn’t vacuum. This means that 𝑛>1, and the larger 𝑛 is, the slower light travels through the medium. In the third video, green laser light passes from air to a piece of acrylic. The index of refraction for the acrylic is 3) (1 point) Calculate the speed of light 𝑣 as it travels Total Internal Reflection. This 1.5-minute video features a demonstration in which a beam of light is directed into a hemicylindrical block of glass. The light approaches along the curved side of the cylinder along the radial line so that there is no refraction upon entering the block. Refraction occurs at the flat edge of the block. In this video You will learn the basics of refraction of light. Here the concept of total internal reflection (TIR) and Critical Angle has also been discusse...Reflection from a Mirror. Update your browser! Adjust the angle of the mirror and see what happens to the reflected beam! Determine the angle when each observer can see the light. Simulation created Steven Sahyun, University of Wisconsin - Whitewater using code modified from Andrew Duffy's Friction on an incline simulator. December 19, 2018. Simulate the reflection of light on a mirror. Mirror (Curved) A mirror whose shape is curved. Can be circular, parabolic, or defined by a custom equation y = f (x). Ideal curved mirror The idealized "curved" mirror which obeys exactly the mirror equation (1/p + 1/q = 1/f). The focal length (in pixels) can be set directly. Beam SplitterThe Plane Mirror Images Interactive is a skill-building tool that allows the user to explore the formation of images in plane mirrors. It makes a wonderful complement to lab activities on the law of reflection and the characteristics of plane mirror images. The Interactive takes a Tutorial approach to these topics.This is a simple simulation showing the reflection and refraction of a ray of light as it attempts to move from one medium to another. Use the sliders to adjust the index of refraction of each of the two materials, as well as the angle of incidence (the angle between the incident ray of light and the normal to the surface). How does a lens or mirror form an image? See how light rays are refracted by a lens or reflected by a mirror. Observe how the image changes when you adjust the focal length of the lens, move the object, or move the screen. Reflection of light (and other forms of electromagnetic radiation) occurs when the waves encounter a surface or other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface. The simplest example of visible light reflection is the surface of a smooth pool of water, where incident light is reflected ... This is a simple simulation showing the reflection and refraction of a ray of light as it attempts to move from one medium to another. Use the sliders to adjust the index of refraction of each of the two materials, as well as the angle of incidence (the angle between the incident ray of light and the normal to the surface).Founded in 2002 by Nobel Laureate Carl Wieman, the PhET Interactive Simulations project at the University of Colorado Boulder creates free interactive math and science simulations. PhET sims are based on extensive education <a {0}>research</a> and engage students through an intuitive, game-like environment where students learn through exploration and discovery. 1 PHYS 304 LAB PhET Simulation: Reflection of Light In this activity students will be exploring reflection of light in a plane mirror using the “Bendin g Light ” PhET simulation. Open the simulation by clicking on the link: Learning Objectives By the end of this lab activity, students will be able to: • Explain what happens to light when ...The phenomenon observed in this part of the lab is known as total internal reflection. Total internal reflection, or TIR as it is intimately called, is the reflection of the total amount of incident light at the boundary between two media. TIR is the topic of focus in Lesson 3. To understand total internal reflection, we will begin with a ... The law of reflection states that the angle of reflection (θ r) equals the angle of incidence (θ i), θ r = θ i (1) The normal, incident ray and reflected ray all lie in the same plane (Fig. 1). In this lab, you will study the image formation by plane mirrors using an online simulation (Fig. 2 below). Fig. 1: Reflection of light from a ...oPhysics. Kinematics. Polarization of Light. Description. This is a simulation intended to help visualize polarization. A polarizing filter has a particular transmission axis and only allows light waves aligned with that axis to pass through. In this simulation unpolarized waves pass through a vertical slit, leaving only their vertical components.Explore bending of light between two media with different indices of refraction. See how changing from air to water to glass changes the bending angle. Play with prisms of different shapes and make rainbows.Interactive is shown in the iFrame below. There is a small hot-spot in the lower-right corner of the iFrame. Dragging this hot-spot allows you to change the size of iFrame to whatever dimensions you prefer. Our Who Can See Who? simulation is now available with a Concept Checker. Do the simulation. Then follow it up with the Concept Checker. Our ...Reflection of Light In this activity students will be exploring reflection of light in a plane mirror using the “Bending Light” PhET simulation. Open the simulation by clicking on the link: Learning Objectives By the end of these activities it is hoped that students will have an acquired the following skills: • Following explicit instructions to gain acquired knowledge • Understand ... This is a simple simulation showing the reflection and refraction of a ray of light as it attempts to move from one medium to another. Use the sliders to adjust the index of refraction of each of the two materials, as well as the angle of incidence (the angle between the incident ray of light and the normal to the surface).Aug 4, 2020 · This is a 60 to 90 min. worksheet related to the concept of refraction and total internal reflection with simulations activities. Students can observe, examine, explore and connect the simulations to the concepts and would have a better understanding of the behaviour of the light rays in prisms with different shapes. Subject Physics Enhance productivity with 3DOptix, Optical design and Simulation software. Ray Optics describes light propagation in terms of “rays” and is commonly concerned with how light is propagated, reflected, and refracted and the formation of images. The “ray” in geometric optics is an abstraction, or “instrument”, which can be used to ... In this activity students will be exploring reflection of light in a plane mirror using the “Bending Light” PhET simulation. Open the simulation by clicking on the link:Polarized light waves are light waves in which the vibrations occur in a single plane. The process of transforming unpolarized light into polarized light is known as polarization. There are a variety of methods of polarizing light. The four methods discussed on this page are: Polarization by Transmission. Reflection of light (and other forms of electromagnetic radiation) occurs when the waves encounter a surface or other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface. This tutorial explores the incident and reflected angles of a single light wave impacting on a smooth surface.In this Interactive, learners can drag a candle to various positions in front of a curved mirror and quickly observe the characteristics of the images that are formed. It's that simple; no dripping candle wax, no mess to clean up, just pure physics. Now available with a Concept Checker.This app is a sort of tutorial which explains the reflection and the refraction of waves by the principle of Huygens. Explanations of each of the steps are provided in the text box. Whenever a step is finished, press the "Next step" button! You can stop and continue the simulation by using the "Pause / Resume" button.Three short virtual lab investigations. 1) Validating Snell's Law, 2) Describing the intensity of the reflected and refracted rays and 3) determining the refractive index of a mystery metal. Subject. Physics. Level. High School, Undergrad - Intro. Type. Guided Activity, Lab. Duration.By converting our sims to HTML5, we make them seamlessly available across platforms and devices. Whether you have laptops, iPads, chromebooks, or BYOD, your favorite PhET sims are always right at your fingertips.Become part of our mission today, and transform the learning experiences of students everywhere! Reflection of Light In this activity students will be exploring reflection of light in a plane mirror using the “Bending Light” PhET simulation. Open the simulation by clicking on the link: Learning Objectives By the end of these activities it is hoped that students will have an acquired the following skills: • Following explicit instructions to gain acquired knowledge • Understand ... Launch Interactive. Learners are encouraged to open the Interactive and Explore. An activity sheet is not needed for this Interactive. Our Who Can See Who? simulation is now available with a Concept Checker. Do the simulation. Then follow it up with the Concept Checker. Learners and Instructors may be interested in viewing the accompanying ... You can explore the color appearance of a person and of the shadows creating by that person on a white screen with our Colored Shadows simulation. Filtering Away. A color filter is a transparent film that absorbs a range of wavelengths of light. Looking at the world through a color filter will change the color appearance of objects.A. Reflection of Light Rays (Review section 28.2 of text). What is not commonly known is that light incident upon a transparent medium (of a different refractive index) will be both refracted and reflected. The reflected light obeys the law of reflection. See figure below from PhET simulation. Figure 18-1Hi Students and Teachers! Here is a tutorial on how to run the Reflection and Refraction Simulation. I hope this is helpful. Remember: This is Fine and I Can... cal simulation of light scattering by multiple wavelength-sized particles near or between planar interfaces. It im-plements the superposition T-matrix method [15, 16, 17] Krzysztof Czajkowski and Dominik Theobald contributed equally to this work. Figure 1: Artistic visualization of a Gaussian beam scattered by multiple particles on a substrate. Mar 3, 2021 · Regular and Diffused Reflection. The light gets reflected from the surfaces. Any surface which is polished or in other words is shiny always acts like a mirror. The observation of light bouncing off the surfaces is termed reflection. The light after reflection travels in the same medium from where the ray was incident on the surface. Science; Physics; Physics questions and answers; In this activity students will be exploring reflection of light in a plane mirror using the "Bending Light" PhET simulation.How does a lens or mirror form an image? See how light rays are refracted by a lens or reflected by a mirror. Observe how the image changes when you adjust the focal length of the lens, move the object, or move the screen. The manner in which light is reflected from a surface depends on the surface’s smoothness. Light that is reflected from a rough, textured surface, such as paper, cloth, or unpolished wood, is reflected in many different directions, as shown in Fig 1(a). This type of reflection is called diffuse reflection.Reflection of light (and other forms of electromagnetic radiation) occurs when the waves encounter a surface or other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface. The simplest example of visible light reflection is the surface of a smooth pool of water, where incident light is reflected ...until the wave theory of light was proposed. It is now well understood and experimentally verified that light travels more slowly through materials than through empty space. Air is mostly empty space, so the slowing down of light in air is very small and can be ignored in many cases. The index of refraction of a material is defined as follows:Reflection from a Mirror. Update your browser! Adjust the angle of the mirror and see what happens to the reflected beam! Determine the angle when each observer can see the light. Simulation created Steven Sahyun, University of Wisconsin - Whitewater using code modified from Andrew Duffy's Friction on an incline simulator. December 19, 2018. Polarized light waves are light waves in which the vibrations occur in a single plane. The process of transforming unpolarized light into polarized light is known as polarization. There are a variety of methods of polarizing light. The four methods discussed on this page are: Polarization by Transmission. Using the Interactive. The Plane Mirror Images Interactive is shown in the iFrame below. There is a small hot-spot in the lower-right corner of the iFrame. Dragging this hot-spot allows you to change the size of iFrame to whatever dimensions you prefer. Now available with Task Tracker compatibility. Learn more. REFLECTION AND REFRACTION SIMULATION. The purpose of this activity is to study how light reflects off a shiny surface, and how it refracts when entering a transparent material. Submit your answers using Blackboard. The angle of incidence and reflection are labeled i and r respectively.This is a simple simulation showing the reflection and refraction of a ray of light as it attempts to move from one medium to another. Use the sliders to adjust the index of refraction of each of the two materials, as well as the angle of incidence (the angle between the incident ray of light and the normal to the surface).Reflection, refraction and diffraction are all boundary behaviors of waves associated with the bending of the path of a wave. The bending of the path is an observable behavior when the medium is a two- or three-dimensional medium. Reflection occurs when there is a bouncing off of a barrier. Reflection of waves off straight barriers follows the ... The angle of incidence in the water is approximately 39°. At this angle, the light refracts out of the water into the surrounding air bending away from the normal. The angle of refraction in the air is approximately 57°. These values for the angle of incidence and refraction are consistent with Snell's Law. Polarized light waves are light waves in which the vibrations occur in a single plane. The process of transforming unpolarized light into polarized light is known as polarization. There are a variety of methods of polarizing light. The four methods discussed on this page are: Polarization by Transmission.Mar 3, 2021 · Regular and Diffused Reflection. The light gets reflected from the surfaces. Any surface which is polished or in other words is shiny always acts like a mirror. The observation of light bouncing off the surfaces is termed reflection. The light after reflection travels in the same medium from where the ray was incident on the surface. .