Across
- 2. is energy that comes from a source and travels through some material or through space
- 4. a solid geometric figure whose two end faces are similar
- 7. any of a group of colors from which all other colors can be obtained by mixing
- 11. unit of frequency, equal to one cycle per second
- 12. the process by which a beam of light or other system of waves is spread out
- 14. periodic motion of a rigid or elastic body or medium forced from a position
- 15. to a substance or material in which something exists or grows
- 19. sound or other vibrations having an ultrasonic frequency
- 20. is a space devoid of air or matter
- 23. a wave vibrating at right angles to the direction of its propagation
- 25. the reinforcement or prolongation of sound by reflection from a surface
- 27. a periodic disturbance of the particles of a substance that may be propagated
- 28. the rate at which a vibration occurs that constitutes a wave
- 29. the degree of highness or lowness of a tone
- 30. is the bending of a light or sound wave
Down
- 1. a system for the detection of objects under water and for measuring the water's depth
- 3. the energy transferred as a result of a difference in temperature
- 5. an electromagnetic wave of high energy and very short wavelength
- 6. a wave vibrating in the direction of propagation
- 8. light in passing through material, electrons, protons and neutrons in solids
- 9. The periodic mechanical vibrations and waves in gases, liquids and solid
- 10. a unit used to measure the intensity of a sound or the power level
- 13. the maximum extent of a vibration
- 16. an electromagnetic wave with a wavelength
- 17. an increase or decrease in the frequency of sound, light, or other waves
- 18. provide with light or lighting
- 21. the combination of two or more electromagnetic waveforms
- 22. the measurable amount of a property, such as force
- 24. a hollow between two wave crests in the sea
- 26. the throwing back by a body or surface of light, heat, or sound without absorbing it