1.a ray of light enters a pool of water from the air along the normal. what is the angle of refraction?
2. The index of refraction of thanol is 1.36. what is the speed of light in ethanol?
3. a beam of light enters a piece of zircon at an angle of incidence of 30 degrees. what is the angle of refraction in the zircon?
4. A ray of light enters a substance at an incident angle of 65 degrees. if the anle of refraction is 22 degrees what is the substance?