Q1.

An experiment to measure the speed of light uses an apparatus similar to Fizeau's. The distance between the light source and the mirror is L = 694 m, and the wheel has N = 230 notches. If the wheel rotates at 538 rev/s when the light from the source is extinguished, what is the experimental value for c (in 10⁶ m/s)?

Q2.

A light ray is incident on the surface of water (n = 1.33) at an angle of 41 relative to the normal to the surface. The angle of the reflected wave is:

Q3.

A light ray whose frequency is f = 6.68 10¹⁴ Hz in vacuum is incident on water (n = 1.333). The wavelength of the light after it enters the water is (in nm)

Q4.

What is the speed of light when it is in a fluid of refractive index n = 1.117. Give your answer in terms of 10⁸ m/s.

Q5.

Light is refracted through a transparent material. If the angle of incidence is 70, and the angle of refraction is 15, what is the index of refraction? (note that these are random numbers, and there may not be a material with this refractive index).