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$\bullet$ . Prove that when a ray of light travels at any angle into the corner formed by two mirrors placed at right angles to each other, the reflected ray emerges parallel to the original ray (see Figure 23.52).

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Thus the reflected ray emerges parallel to incident ray. Its direction is opposite to the incident ray.

Physics 102 Electricity and Magnetism

Physics 103

Chapter 23

Electromagnetic Waves and Propagationof Light

Electromagnetic Waves

Reflection and Refraction of Light

Rutgers, The State University of New Jersey

Hope College

University of Winnipeg

McMaster University

Lectures

02:30

In optics, ray optics is a geometric optics method that uses ray tracing to model the propagation of light through an optical system. As in all geometric optics methods, the ray optics model assumes that light travels in straight lines and that the index of refraction of the optical material remains constant throughout the system.

10:00

In optics, reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of light, sound and water waves. The law of reflection says that for specular reflection the angle at which the wave is incident on the surface equals the angle at which it is reflected. Reflection may also be referred to as "mirror image" or "specular reflection". Refraction is the change in direction of a wave due to a change in its speed. The refractive index of a material is a measure of its ability to change the direction of a wave. A material with a higher refractive index will change the direction of a wave to a greater degree than a material with a lower refractive index. When a wave crosses the boundary between two materials with different refractive indices, part of the wave is refracted; that is, it changes direction. The ratio of the speeds of propagation of the two waves determines the angle of refraction, which is the angle between the direction of the incident and the refractive rays.

00:56

Show that when light refle…

03:44

Show that a light ray that…

01:43

0:00

03:14

Show that if a ray of ligh…

01:18

Prove that a ray of light …

02:20

$\bullet$ Show that when a…

Show that if two plane mir…

02:28

Choose two rays in Fig. 23…

01:54

Prove that when the angle …

03:54

Two plane mirrors are at r…

03:04

A point source of light is…

06:11

in this problem, we have to show that the incident way it's fell into the this emerging, right. So we need toe show all four equals to fight Applying the war for reflections at point C. We can say that the Southie tables too fight No. Using the Triangle ABC Embassy, we can say that this theater equals 2 90 degree minus gamma our it convenient in as a P D equals two mind you DVD minus we can wind up for gamma is a 90 degree minus bitter. So this will you want to devalue 40 days to take was to be the we're using the law reflection point A We considered this is a bit equals two Alfa. So this means that these three days equals to offer No, we know that this Peter is equals toe fi and three days it goes to all far so comparing these two requirements we can set these are all four equals to fight. So this means that the incidentally is palate to the emerging away

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