Across
- 4. A transparent material that selectively transmits light
- 7. Light that can contain more than one wavelength, travel in more than one direction, and has varying distances between the corresponding crests of the waves.
- 9. System that uses the reflection of sound waves to detect objects underwater
- 12. Collection of sounds deliberately used in a regular pattern
- 15. Device that reads intensities of reflected light and converts the information to digital
- 16. Light whose magnetic field vibrates in only one direction
- 18. Change in frequency that occurs when a source is moving relative to an observer
- 20. Light produced by heating a piece of metal, usually tungsten until it glows
- 23. Light generated by using phosphors to convert ultraviolet radiation to visible light
- 25. Human perception of sound volume, depends primarily on intensity
- 27. The study of sound
- 28. Tough membrane in the outer ear that is about 0.1 mm thick and transmits sound vibrations into the middle ear.
- 29. Technique that produces a complete three dimensional photographic image of an object
- 30. Material that transmits and scatters light so that objects viewed through it appear blurry
Down
- 1. The complete reflection of light at a boundary that occurs when light strikes at an angle greater than the critical angle, and light travels faster in the second medium that in the first medium
- 2. Image of a distant object produced by the refraction of light through air layers of different densities
- 3. Perception of how high or low a sound is, related to the frequency of the sound waves
- 5. Process by which objects are located by emitting sounds and interpreting the sound waves that are reflected from those objects
- 6. Vibration whose frequency is a multiple of the fundamental frequency
- 8. Sound waves with frequency above 20,000 Hz; cannot be heard by humans
- 10. Hollow, air filled chamber that amplifies sound when the air inside it vibrates
- 11. Material that transmits light without scattering so that objects are clearly visible through
- 13. Spiral shaped, fluid filled structure in the inner ear that converts sound waves to nerve impulses.
- 14. Colored material that is used to change the color of other substances
- 17. Unit for sound intensity, abbreviated dB
- 19. Amount of energy that flows through a certain area in a specific amount of time
- 21. Result of the difference between sounds having the same pitch and loudness
- 22. Light of one wavelength that travels in one direction with a constant distance between the corresponding crests of the waves.
- 24. Property of a material indicating how much speed of light is reduced in the material compared to the speed of light in a vacuum
- 26. Material that absorbs or reflects all light and does no transmit any light