1. The speed of light in a material is 1.93 x 10 8 m/s. What is the index of refraction of the material? 2. Light travels from water (index of refraction 1.33) into crown glass (index of refraction 1.52) at an angle of incidence of 42.0 degrees. Find the angle of refraction in the crown glass. (Ans: 35.8 degrees)
3. Determine the index of refraction of a liquid material if the angle of incidence in air is 40.0 degrees and the angle of refraction in the material is 25.9 degrees?

can someone solve and do working of these 3 questions please thanks alot.