1. Mercury is 69.7 X 10⁶ km from the sun. How much time does to take for a light ray to travel from the Sun to Mercury?

2. A radio signal takes 2 minutes and 18 seconds to travel from the Earth to Venus. How how away is Venus from the Earth in meters and Miles.

3. How many FEET does light travel in 1 nanosecond (1.0 X 10^-9 s).

4. The average radius of the sun is 6.96 X 10⁵ km. If light could bend around the sun, how many times could a ray of light travel around the sun in 1.0 second?

5. How many miles does light travel in one year's time?

6. The wavelength of red light is about 650 X 10^-9 m.
a. What is the frequency of the light?
b. What is the energy of a photon of light?

7. What is the wavelength of a radio wave whose frequency is 97.5 MHz?

8. What is the wavelength of a radio wave whose frequency is 1040 kHz?

9. What is the frequency of a green light whose wavelength is 741 X 10^-9 m?































Problems:
10 Draw the relative position of the refracted light ray.

11 Draw the relative position of the refracted light ray.


12 What is the angle of the refracted light ray?



13 What is the critical angle for the following situations?





14 What will happen to the light ray? (Is it reflected and at what angle? Is it refracted and at what angle?)



15 Two pairs of polarized sunglasses are held at 90° and 50° from the horizontal. By what factor has the intensity of the transmitted light been changed?
16 Three pairs of polarized sunglasses are held up in front of one another. The first pair the light hits is held at 20° from the vertical. The second pair is held at 70° from the vertical. The third pair is held at 90° from the vertical. By what factor has the intensity of the transmitted light been changed?
17 Three pairs of polarized sunglasses are held up in front of one another. The first pair the light hits is held at 70° from the vertical. The second pair is held at 90° from the vertical. The third pair is held at 20° from the vertical. By what factor has the intensity of the transmitted light been changed?

18 What is the angle of maximum polarization for the reflected ray of light that bounces off of a diamond?
19 What is the angle of maximum polarization as a light ray bounces off a piece of glass under the water?
20 What is the angle of maximum polarization as a light ray bounces off a piece of glass that is laying in the air next tot he water?
21 What is the refracted angle of a light ray that bounces off a piece off plastic whose index of refraction is 1.41 if the reflected angle is at its maximum polarization?
22 A light ray is refracted at a 30° angle from the normal. The reflected light ray is maximally polarized. What is the angle of the incident light ray?
23 A piece of material in the air reflects a light ray at 35°. The reflected ray is maximally polarized. What is the index of refraction of this material?
24art If you are standing such that your eyes are 2.0 meters vertically from the waters smooth surface, then how far away from you is the glare on the water if the glare is at the angle of maximum polarization?