Question 1

A light ray emerges from the bottom of a 45° glass prism into air, as shown in Figure 22-4.
 
 From which direction was the ray incident on the prism?
A) B
B) A
C) D
D) C

Accepted Answer

The answer of A light ray emerges from the bottom...

Question 2

When the index of refraction of a transparent material varies with wavelength, the material exhibits
A) density variation.
B) reflection.
C) polarization.
D) total internal reflection.
E) dispersion.

Accepted Answer

Dispersion occurs when the index of refraction of a material varies with the wavelength of light, causing different colors of light to bend at different angles as they pass through the material. This phenomenon is responsible for the splitting of white light into its constituent colors by a prism.

Question 3

In common transparent media, as the frequency of light increases, the index of refraction
A) varies as the sine of the incident angle.
B) increases.
C) stays constant.
D) decreases.

Accepted Answer

As the frequency of light increases, the index of refraction typically increases in common transparent media. This is due to the dispersion of light, where different frequencies (colors) of light are refracted (bent) by different amounts as they pass through a material.

Question 4

Which of the following colors undergoes the greatest REFRACTION when passing from air into glass?
A) orange
B) blue
C) red
D) green
E) yellow

Accepted Answer

Blue light undergoes the greatest refraction when passing from air into glass because it has a shorter wavelength compared to the other colors listed. The amount of refraction a wave undergoes depends on its wavelength, with shorter wavelengths bending more.

Question 5

You can only see a rainbow if
A) the sun is 90° to the side.
B) the sun is in front of you.
C) the sun is 180° to the side.
D) the sun is behind you.

Accepted Answer

To see a rainbow, the sun must be behind you. The light from the sun is refracted, or bent, by raindrops, creating the spectrum of colors that form the rainbow. This phenomenon requires the sun to be at your back and the rain in front of you.

Question 6

The color on the outer edge of the primary rainbow is
A) green
B) red
C) yellow
D) violet
E) white

Accepted Answer

The color on the outer edge of the primary rainbow is red. This is due to the dispersion of light as it passes through water droplets, causing light to split into its component colors at different angles, with red being refracted the least, thus appearing on the outer edge.

Question 7

Rainbows are caused by sunlight being
A) refracted & reflected but not dispersed.
B) dispersed, refracted, & reflected.
C) reflected.
D) dispersed.
E) refracted.

Accepted Answer

Rainbows occur when sunlight is dispersed into a spectrum of colors, then refracted (bent) as it enters and exits raindrops, and finally reflected off the back of the raindrop to the viewer. This process involves dispersion, refraction, and reflection, making option B the correct answer.

Question 8

A laser beam strikes a plane reflecting surface with an angle of incidence of 37°. What is the angle between the incident ray and the reflected ray?

Accepted Answer

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Question 9

If a transparent material has an index of refraction of 1.67, what is the speed of light in the material?

Accepted Answer

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Question 10

Red light with a wavelength of 650. nm travels from air into a liquid with an index of 1.33. What is the frequency and wavelength in the liquid?

Accepted Answer

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Question 11

A light beam enters water at an angle of incidence of 37°. Determine the angle of refraction.

Accepted Answer

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Question 12

Light of wavelength 550. nm in air is found to travel at 1.96 × 10⁸ m/s in a certain liquid. (a) Determine the index of refraction of the liquid. (b) Determine the frequency of the light in air.

Accepted Answer

The answer of Light of wavelength 550. nm in air...

Question 13

Light of wavelength 550 nm in air is found to travel at 1.96 × 10⁸ m/s in a certain liquid. Determine (a) the frequency of the light in the liquid. (b) the wavelength of the light in the liquid.

Accepted Answer

The answer of Light of wavelength 550 nm in air...

Question 14

A light beam having a wavelength of 470. nm in air is directed into glycerine (n = 1.47) 
(a) What is the frequency of the light in the glycerine?
(b) What is its wavelength in the glycerine?
(c) If the incident angle is 75.0°, what is the refracted angle?

Accepted Answer

The answer of A light beam having a wavelength of...

Question 15

A person looks straight down into a large cube of glass. Three cm below the surface is a bubble. How far below the surface does the bubble appear to the person?

Accepted Answer

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Question 16

How long does it take a light beam to cross a 6. m wide room? If the air were replaced with a transparent medium of index n, how much longer would it take?

Accepted Answer

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Question 17

A point source of light is positioned 20.0 m below the surface of a lake. What is the diameter of the largest circle on the surface of the water through which light can emerge?

Accepted Answer

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Question 18

A buoy, used to mark a harbor channel, consists of a weighted rod 2.00 m in length. 1.50 m of the rod is immersed in water and 0.500 m extends above the surface. If sunlight is incident on the water with an angle of incidence of 40.0°, what is the length of the shadow of the buoy on the level bottom of the harbor?

Accepted Answer

The answer of A buoy, used to mark a harbor...

Question 19

A light ray strikes a glass plate of thickness 0.80 cm at an angle of incidence of 60°. The index of refraction of the glass is 1.55. By how much is the beam displaced from its original line of travel after it has passed through the glass?

Accepted Answer

The answer of A light ray strikes a glass plate...

Question 20

A light beam with wavelength 440. nm in a material then enters air and its wavelength becomes 577. nm.
(a) What is the index of refraction for the material? 
(b) At what angle with the surface will the beam be totally reflected back in the material?

Accepted Answer

The answer of A light beam with wavelength 440. nm...

Quiz 22: Reflection and Refraction of Light

A light ray emerges from the bottom of a 45° glass prism into air, as shown in Figure 22-4. From which direction was the ray incident on the prism?

When the index of refraction of a transparent material varies with wavelength, the material exhibits

In common transparent media, as the frequency of light increases, the index of refraction

Which of the following colors undergoes the greatest REFRACTION when passing from air into glass?

You can only see a rainbow if

The color on the outer edge of the primary rainbow is

Rainbows are caused by sunlight being