The index of refraction of a particular liquid is 1.31. At what speed would a wave crest in a beam of light travel through this medium? If a diver who is underwater shines a flashlight upward toward...

The index of refraction of a particular liquid is 1.31. At what speed would a wave crest in a beam of light travel through

this medium?

If a diver who is underwater shines a flashlight upward toward the surface, at an angle of 29 degrees from the normal, at

what angle does the light emerge from the water? Indices of refraction: water, 1.33; air, 1.00029