Across
- 2. The direction that light is reflected in relation to the normal when it leaves a glass block.
- 3. The number of waves passing a fixed point in one second.
- 5. Type of wave which vibrates in a direction which is parallel to the direction of the wave.
- 7. Type of wave which vibrated in a direction which is perpendicular to the wave.
- 8. The direction that light is reflected in relation to the normal as it enters a glass block.
- 10. The size of gap which will produce less diffraction.
- 12. The angle of reflection is always this word to the angle of incidence.
- 13. The upright, inverted image seen in a mirror.
- 15. The height of a wave crest.
- 16. The spreading of waves when they move through a gap or past an object.
Down
- 1. The distance between two wave crests.
- 4. Type of wave which can travel through a vacuum.
- 6. A line running at right angles to a mirror or glass block.
- 9. The bending of light when it moves between different transparent materials.
- 11. Type of wave which can only travel through a medium such as air and water.
- 14. The units of frequency.