The speed of light c in a vacuum is 2.997 x 108 m/s. Given that the index of refraction in ethanol is 1.361, what is the speed of light vethanol in ethanol? Vethanol = m/s Given that the index of refraction in fluorite is 1.434, what is the speed of light VAuorite in fluorite? VAuorite = m/s

In the figure shown, a light ray travelling through air (n=1.0) strikes the surface of an unknown material. The soeed of light in this unknown material is only 1.2E8 m)s, and the angke marked (alpha) in the figure is 30 degrees.    A) What is the index of refraction of the unknown material?   B) What is the angle marked (Beta) in the figure?       2) Draw a history graph for the position x= -2m for the same wave pulse shown in the diagram figure above. Show some mathematical proofs

A ray of light crosses the boundary between some substance with n = 1.54 and air, going from the substance into air. If the angle of incidence is 29◦ what is the angle of refraction?   Calculate to 1decimal.

A light ray traveling in water is incident upon a transparent medium. The angle of incidence is 45.0°, and the transmitted ray is refracted at an angle of 20.0°. What is the speed of light in the transparent medium (in m/s)? X What is the index of refraction of the transparent medium? How is it related to the speed of light in vacuum and the speed of light in the medium? m/s