Across
- 3. The bending of waves through gaps or around obstacles.
- 6. The change in speed of light as it passes from one medium to another (e.g. from air to glass).
- 7. The time taken for one wave to pass a point. It is also known as the inverse of the frequency.
- 9. The angle measured between the refracted ray and the normal is called the angle of _______.
- 11. The part of the EM spectrum with the shortest wavelength
- 14. The number of waves per second.
- 15. The distance travelled per second. It is also the frequency multiplied by the wavelength.
- 20. A group of all the types of electromagnetic radiation ordered in terms of their wavelength/frequency.
- 21. A _________ wave is one where the particles vibrate along the same direction as the wave.
Down
- 1. The part of the EM spectrum with the lowest energy
- 2. The horizontal distance from one crest to the next crest, one trough to the next trough or one point on a wave to the same point on the next wave.
- 4. a _______ wave is one where the particles move at right angles (90°) to the direction of travel of the wave.
- 5. A dashed line that is drawn perpendicular (at 90°) to any surface.
- 8. The triangular device used to spread light into its colours.
- 10. The bottom point of a wave.
- 12. The 'stuff' that a wave travels through.
- 13. The vertical distance from the axis to the top of the wave(crest) or bottom of the wave (trough). It is also half the vertical height of the wave.
- 16. The top point (peak) of a wave.
- 17. photographic _______ can be used as a detector for visible light, UV, Xrays, and gamma.
- 18. The part of the EM spectrum between visible and Xrays.
- 19. The angle measured between the incident ray and the normal is called the angle of _________.