The critical angle is defined as the angle of incidence at which the total internal reflection starts to occur. - True or False?
2. A ray of light is traveling through air at an angle of 30° to the vertical. It passes into water and halves its angle to the vertical. What is the index of refraction of water?
θair = 1.00
a. 1.93
b. 0.52
c. 0.88
d. 1.54
3. A beam of light going through a medium with an index of refraction of 1.14 has an angle of incidence of 48° with another medium. If the light wave is at a new angle of 39°, what is the index of refraction for the second medium?
a. 1.14
b. 0.98
c. 1.55
d. 1.346
4. Light travels from air n=1 to water n=1.33. If the angle of incidence is 45°, determine the angle of refraction.
a. 52.5°
b. 32.1°
c. 17.7°
d. 63.3°