8. When light travels from air to an unknown material at an

Last updated: 7/10/2022

8. When light travels from air to an unknown material at an incident angle of 50°, it is refracted at an angle of 30°. What will be the critical angle for this material if it is placed in water? (Use 1.33 for the refractive index of water.) a) 54.6° b) 66.9° c) 60.2° d) 0° e) 49.6°