Worksheet Reflection and Refraction

1. A light ray originates in a liquid having an index of refraction of 2.2 and enters a second liquid having an index of refraction of 3.5.

a. If the incident angle is 35?, what is the angle of refraction?

b. Answer the same question if the light ray had originated in the second medium. Use the same angle of incidence.

2. What is the speed of light passing through a medium having an index of refraction of 4.5?

3. What is the speed of light passing through a medium having an index of refraction of 2.25?

4. What is the index of refraction of a medium if light travels through the medium at a speed of 1.5 x 108 m/s?

5. What is the index of refraction of a medium if the light travels through the medium at a speed of 2.65 x 108 m/s?

6. What is the critical angle for a medium having an index of refraction of 3.3?

7. What is the critical angle for a medium having an index of refraction of 1.85?

8. What is the apparent depth of a liquid that is actually 500 cm deep when viewed from straight down if the index of refraction is 2.6?

9. What is the apparent depth of a liquid that is actually 400 cm deep when viewed from straight down if the index of refraction is 2.15?

10. A ray of light enters from the air into a medium having an index of refraction of 1.85.

a. What is the angle of refraction if the angle of incidence is 20??

b. What is the angle of refraction if the entering ray makes an angle of 70?with the surface of the medium?

11. A ray enters from air into a medium having an index of refraction of 1.48.

a. What is the angle of refraction if the angle of incidence is 36??

b. What is the angle of refraction if the entering ray makes an angle of 59? with the surface of the medium?

12. What is the angle of refraction? ____________

n1 = 1

n2 = 1.8

24?

13. A ray of light originating in the air enters a layer of liquid at an angle to the normal of 30?. The ray then passes into a second layer before striking the bottom. The index of refraction for each layer is 3.2, 2.0 respectively. Each layer is 600 m deep. How much time is required for the light ray to reach the bottom?

30?

n1 = 1

n2 =3.2

600 m

n3 = 2.0 600 m

14. A laser is in a medium of index of refraction 1.9. The laser is directed toward point P.

How far above or below does the laser beam miss point P?

140 cm 150 cm 300 cm P

n1 = 1.9 n2 =1.2 n3 = 1

140 cm

13.34?

Laser

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