Across
- 1. An electromagnetic wave within the range of radio frequencies
- 5. The throwing back by a body or surface of light, heat, or sound without absorbing it.
- 6. The bending and spreading of a wave, such as a light wave, around the edge of an object.
- 7. A wave vibrating at right angles to the direction of its propagation.
- 8. the bending of light as it passes from one substance to another.
Down
- 2. The angle that an incident line or ray makes with a perpendicular to the surface at the point of incidence.
- 3. the smallest angle of incidence for which light is totally reflected.
- 4. the distance between a point on one wave and the same point on the next wave