# Waves Review

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## Across

1. The separation of polychromatic light in to its component wavelengths or colors (makes a rainbow)
2. If light enters a second medium at this angle, it will never bend.
3. The length of a single cycle
4. Point on a standing wave where the energy is smallest
5. This type of wave cannot travel through a vacuum
6. When a pulse reaches a fixed boundary it reflects and _____
7. When there is a 180 degree difference between two waves, we say they are completely _____ of phase.
8. This kind of interference occurs when a crest meets a trough
9. This color gets bent or refracted the most in a prism.
10. Every electromagnetic wave on your reference table travels at the ______________ of light in a vacuum
11. Determines loudness of a wave
12. IF A FAST MOVING STAR MOVES TOWARDS THE EARTH ITS COLOR WILL SHIFT TOWARDS THIS PART OF THE SPECTRUM
13. The time it takes for a single wave to pass. (inverse to freq)
14. IF A FAST MOVING STAR MOVES AWAY from THE EARTH ITS COLOR WILL SHIFT TOWARDS THIS PART OF THE SPECTRUM
15. In this type of wave, the vibration is perpendicular to the direction the wave travels.
16. AS THE FREQUENCY OF A WAVE INCREASES ITS WAVELENGTH
17. The filtering of light due to its orientation
18. A wave with a frequency of 1 x 10^8 Hz (see ref.)
19. In refraction problems we always measure our angle with respect to the _____________ (hint - dotted line)
20. This speed of a wave is determined by the ____________

## Down

1. The change in the observed frequency of a wave when there is relative motion between the source and receiver of a wave. _________ effect
2. THE COLOR OF A LIGHT WAVE WITH A FREQUENCY OF 5 X 10^14 HZ
3. The third slowest color in glass.
4. When the vibration of one object causes the vibration of another object.
5. This kind of interference occurs when a trough meets a trough
6. In this type of wave, the vibration is parallel to the direction the wave travels.
7. Unit of frequency
8. Point on a standing wave where the energy is greatest
9. This kind of reflection does not produce an image
10. A series of evenly timed vibrations produce a _______ wave.
11. This electromagnetic wave has a lower frequency than visible light and higher frequency than radio waves
12. Law of Reflection - Angle of ________ equals the angle of reflection
13. This kind of reflection produces an image
14. The spreading out of a wave in to a region beyond a boundary or opening. Proves light is a wave.
15. This wave term has no units - _________ of refraction
16. RELATIONSHIP BETWEEN FREQUENCY AND WAVELENGTH IS
17. When waves of the same frequency and amplitude traveling in opposite directions meet, a ____________wave is produced.
18. The larger the index of refraction (n), the __________the medium
19. This property of a wave does not change when light refracts

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