1. The index of refraction for air is approximately 1.00, and for quartz it's about 1.50. A light beam in air strikes the surface of the quartz at an angle of 30° with the normal. When it enters the quartz it is refracted. Calculate this approximate angle of refraction.
A. 8 degrees
B. 13 degrees
C. 19 degrees
D. 60 degrees
2. A light beam in air strikes the surface of water at an angle of 26° with the normal. When it enters the water it bends towards the normal and makes an angle of 19° with it. The velocity of light in water is approximately 225,000 km/s. What is the approximate velocity of light in air?
A. 200,000 km/s
B. 300,000 km/s
C. 400,000 km/s
D. 500,000 km/s