F4 Chapter 6.1 Refraction of light

Refraction of light is a phenomena

• where the frequency and speed of light change when it crosses the boundary between two materials of different optical densities.

• where the direction and speed of light change when it crosses the boundary between two materials of different optical densities.

• where the direction and frequency of light change when it crosses the boundary between two materials of different optical densities.

• where the wavelength and frequency of light change when it crosses the boundary between two materials of different optical densities.

Diagram show a straw is placed into a cup of water. Which light phenomena explains this situation?

• Reflection

• Refraction

• Reflaction

• Refrection

Diagram shows a light ray propagate from air to glass. What is the refractive index of the glass?

Diagram shows a incident ray is directed into a glass block. Which direction does the light travels after through X?

• A

• B

• C

• D

Calculate the refractive index of the glass block

• 1.51

• 1.32

• 0.66

• 0.61

• 59.4

• 22.5

• 33.1

• 67.9

• 15.5

• 53.1

• 35.4

• 46.5

A fish appear at position of 1.2m from the surface of water. What is the actual position of the fish? ( refractive index of water= 1.33)

• 1.59m

• 1.35m

• 1.26m

• 1.03m

A boy finds it difficult to touch a fish in a river. What should he do in order to touch the fish?

• Move his hand nearer to the surface of water

• Move his hands deeper into the water

• Move his hands faster at the same depth of water

• Shout to the fish "freeze！you are under arrest!"