Question 1

State the law of reflection.

Accepted Answer

The angle of incidence is equal to the angle of reflection.

Question 2

Describe the differences between secular and diffuse reflection.

Accepted Answer

Specular reflection occurs when the reflecting surface is smooth and flat. The reflected rays from parallel incident rays are also parallel. Diffuse reflection occurs when the reflecting surface is rough. The reflected rays from parallel incident rays are not parallel because of the irregular nature of the surface.

Question 3

The critical angle is given by sin_c (1/n₁) for what condition?

Accepted Answer

The second index n₂ =1.00

Question 4

Arrange in order of increasing wavelength: blue, green, indigo, orange, red, violet, yellow.

Accepted Answer

The answer of Arrange in order of increasing wavelength: blue,...

Question 5

The use of wave fronts and rays to describe optical phenomena is called

Accepted Answer

Geometrical optics, also known as ray optics, uses the concepts of wave fronts and rays to describe how light moves in terms of rays that travel in straight lines and how these rays interact with surfaces.

Question 6

The angle of incidence can vary between zero and

Accepted Answer

The angle of incidence refers to the angle at which a ray of light or radiation strikes a surface relative to the normal (perpendicular) to the surface. It can vary from 0 (directly along the normal) to $\pi/2$ radians (parallel to the surface), but not beyond, as angles beyond $\pi/2$ would imply the ray is coming from within the material.

Question 7

The angle of incidence

Accepted Answer

According to the law of reflection, the angle of incidence must equal the angle of reflection.

Question 8

When a ray of light passes obliquely from one medium to another, which of the following changes?

Accepted Answer

When a ray of light passes obliquely from one medium to another, its speed, wavelength, and direction of travel change due to refraction. The change in speed leads to a change in wavelength, and the change in medium causes the light to bend, altering its direction.

Question 9

When a light wave enters into a medium of different optical density

Accepted Answer

When a light wave enters a medium of different optical density, its speed and wavelength change, but its frequency remains constant because frequency is determined by the source of the light and does not change when light moves from one medium to another.

Question 10

Optical density is directly proportional to

Accepted Answer

Optical density is a measure of how much a material slows down light passing through it, which is directly related to the material's index of refraction. The index of refraction quantifies how much light bends, or refracts, when entering a material from another medium.

Question 11

Which of the following materials has the slowest speed of light?

Accepted Answer

The speed of light is slowest in materials with a high refractive index, as the light is slowed down more significantly when passing through. Diamond has one of the highest refractive indices among common materials, making it the material in which light travels the slowest among the options given.

Question 12

An index of refraction less than one for a medium would imply that

Accepted Answer

The index of refraction (n) is defined as the ratio of the speed of light in vacuum (c) to the speed of light in the medium (v), given by n = c/v. An index of refraction less than one implies that the speed of light in the medium is greater than the speed of light in vacuum, since this would make the denominator of the fraction larger than the numerator.

Question 13

A ray of light, which is traveling in a vacuum, is incident on a glass plate (n = ng). For increasing angles of incidence, the angle of refraction

Accepted Answer

Snell's law states that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the speed of light in the first medium to the speed of light in the second medium. As the angle of incidence increases, the angle of refraction also increases, approaching the limiting value of sin^-1 (1/n_g) degrees.

Question 14

Shown here in Figure 22-1 are some possible paths that a light ray can follow in going either from glass to air or from air into glass.

In the drawing you are not told whether the light is going from left to right or from right to left. Which path did the light follow?

Accepted Answer

The answer of Shown here in Figure 22-1 are some...

Question 15

A light beam composed of red and blue light is incident upon a rectangular glass plate, as shown in Figure 22-2.
 
The light emerges into the air from point P as two separate beams

Accepted Answer

The answer of A light beam composed of red and...

Question 16

Fiber optics depends upon the phenomenon of

Accepted Answer

Fiber optics primarily relies on the phenomenon of total internal reflection. This is the process by which light signals are kept within the optical fiber, allowing for the transmission of data over long distances without significant loss.

Question 17

When TOTAL REFLECTION occurs at a surface, the incident angle must be in the substance with the higher

Accepted Answer

Total internal reflection occurs when light travels from a medium with a higher index of refraction to one with a lower index of refraction, and the angle of incidence exceeds the critical angle for the interface between the two media.

Question 18

For certain angles, TOTAL INTERNAL REFLECTION can occur when light tries to pass from one medium to another which has

Accepted Answer

Total internal reflection occurs when light tries to pass from a medium with a larger index of refraction to a medium with a smaller index of refraction, and the angle of incidence exceeds the critical angle.

Question 19

Fiberscopes are based on the physical phenomena called

Accepted Answer

Fiberscopes work on the principle of total internal reflection, where light is transmitted along the fiber optic strands without loss of intensity, allowing for the transmission of images or light over distances.

Question 20

A ray of light (inc) enters a 45° - 90° glass prism from air (bottom left), as shown in Figure 22-3. 
 In what direction does the light re-emerge back into the air?

Accepted Answer

The answer of A ray of light (inc) enters a...

Quiz 22: Reflection and Refraction of Light

State the law of reflection.

Describe the differences between secular and diffuse reflection.

The critical angle is given by sin_c (1/n₁) for what condition?

Arrange in order of increasing wavelength: blue, green, indigo, orange, red, violet, yellow.

The use of wave fronts and rays to describe optical phenomena is called

The angle of incidence can vary between zero and

The angle of incidence

When a ray of light passes obliquely from one medium to another, which of the following changes?

When a light wave enters into a medium of different optical density

Optical density is directly proportional to

Which of the following materials has the slowest speed of light?

An index of refraction less than one for a medium would imply that

A ray of light, which is traveling in a vacuum, is incident on a glass plate (n = ng) . For increasing angles of incidence, the angle of refraction

Shown here in Figure 22-1 are some possible paths that a light ray can follow in going either from glass to air or from air into glass. In the drawing you are not told whether the light is going from left to right or from right to left. Which path did the light follow?

A light beam composed of red and blue light is incident upon a rectangular glass plate, as shown in Figure 22-2. The light emerges into the air from point P as two separate beams

Fiber optics depends upon the phenomenon of

When TOTAL REFLECTION occurs at a surface, the incident angle must be in the substance with the higher

For certain angles, TOTAL INTERNAL REFLECTION can occur when light tries to pass from one medium to another which has

Fiberscopes are based on the physical phenomena called

A ray of light (inc) enters a 45° - 90° glass prism from air (bottom left) , as shown in Figure 22-3. In what direction does the light re-emerge back into the air?

Quiz 22: Reflection and Refraction of Light

State the law of reflection.

Describe the differences between secular and diffuse reflection.

The critical angle is given by sinc (1/n1) for what condition?

Arrange in order of increasing wavelength: blue, green, indigo, orange, red, violet, yellow.

The use of wave fronts and rays to describe optical phenomena is called

The angle of incidence can vary between zero and

The angle of incidence

When a ray of light passes obliquely from one medium to another, which of the following changes?

When a light wave enters into a medium of different optical density

Optical density is directly proportional to

Which of the following materials has the slowest speed of light?

An index of refraction less than one for a medium would imply that

A ray of light, which is traveling in a vacuum, is incident on a glass plate (n = ng) . For increasing angles of incidence, the angle of refraction

Shown here in Figure 22-1 are some possible paths that a light ray can follow in going either from glass to air or from air into glass. In the drawing you are not told whether the light is going from left to right or from right to left. Which path did the light follow?

A light beam composed of red and blue light is incident upon a rectangular glass plate, as shown in Figure 22-2. The light emerges into the air from point P as two separate beams

Fiber optics depends upon the phenomenon of

When TOTAL REFLECTION occurs at a surface, the incident angle must be in the substance with the higher

For certain angles, TOTAL INTERNAL REFLECTION can occur when light tries to pass from one medium to another which has

Fiberscopes are based on the physical phenomena called

A ray of light (inc) enters a 45° - 90° glass prism from air (bottom left) , as shown in Figure 22-3. In what direction does the light re-emerge back into the air?

The critical angle is given by sin_c (1/n₁) for what condition?