Hi all. I just have a few questions regarding light refraction and reflection. At sunset, the sun seems to be higher in the sky than it really is- correct? What causes this? Which color of light is refracted least by a glass prism? How do each of the colors separate through a prism to determine how they are reflected/refracted? Last, but not least: A layer of oil floats on a layer or water. A ray of light in the air above the oil strikes the oil at an incidence angle of 40*. The ray continues through the oil into the water. What is the angle of refraction of the light ray in water? I know that the index for water is 1.33, for oil it is 1.45, and for air it is 1.00. I got the answer to be 28.9* and I feel pretty confident that is correct....but could someone just double-check my thinking please? Thank you so much!!!