1. A beam of light shoots from air into a piece of glass. If the refracted angle is half of the incident angle, what is the incident angle?
2. Find the critical angle for an optical fiber whose core has n value of 1.50 and whose cladding has n value of 1.15.
3. The light intensity received by Earth from the sun is 1400 W/m2. From this data, find the power of the sun in W.