Across
- 2. density A measure of how much a material refracts or slows down light.
- 5. of incidence The angle between an incoming light ray and the normal to a surface.
- 6. of reflection The angle between a reflected light ray and the normal to a surface.
- 7. Not allowing any light to pass through.
- 9. bouncing back of light rays when they hit a surface that does not allow them to pass through.
Down
- 1. An imaginary line that is perpendicular to the surface a wave is traveling through, used as a reference for measuring angles.
- 3. Allowing some light to pass through but scattering it in different directions.
- 4. The bending of light as it passes from one material to another at an angle.
- 8. The material in which a wave travels through, such as air, water, or glass.