Across
- 1. lowest frequency of visible light
- 4. can pass through space, gases, liquids, and some solids
- 7. light curving inward to a focal point
- 8. Lowest point of a wave
- 10. Sound waves with frequencies above 20,000 Hz. Can be used to produce images in the body
- 12. not letting light through
- 13. light curved outward
- 14. high-frequency light waves beyond the violet frequency
- 19. A wave that moves in a direction perpendicular to the direction in which the wave travels (side to side)
- 20. the height of a wave's crest or trough
- 21. The bouncing back of a wave when it hits a surface through which it cannot pass.
- 23. Allowing light to pass through, light scattered, some absorbed
- 25. electromagnetic waves with wavelengths shorter than ultraviolet rays, but longer than gamma rays
- 26. light electromagnetic waves that are visible to the human eye
- 29. Allowing light to pass through
Down
- 2. the process of using reflected sound waves to find objects; used by animals such as bats
- 3. A wave that moves the medium in a direction parallel to the direction in which the wave travels (back and forth)
- 5. The distance between two corresponding crests or troughs
- 6. can pass through solids, liquids, gases
- 9. Electromagnetic waves with the longest wavelengths and lowest frequencies
- 11. light turned into heat energy when interacting with a material
- 15. Highest point of a wave
- 16. Electromagnetic waves with the shortest wavelengths and highest frequencies
- 17. The bending of a wave as it passes at an angle from one medium to another
- 18. Highest frequency of visible light
- 22. A piece of glass that separates white light into colors of the spectrum.
- 24. Unit of frequency
- 27. the number of complete wavelengths that pass a point in a given time
- 28. electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves. HEAT