Waves

2. is a wave whose oscillations are perpendicular to the direction of the wave's advance
7. ray When a ray of light approaches a smooth polished surface and the light ray bounces back
8. when a wave is not confined to a given space along the medium
11. is the mirror-like reflection of waves
14. the process by which a beam of light or other system of waves is spread out as a result of passing through a narrow aperture or across an edge
16. the application of balanced inward forces to different points on a material or structure, that is, forces with no net sum or torque directed so as to reduce its size in one or more directions
17. is the change in frequency of a wave in relation to an observer who is moving relative to the wave source
18. a vibrational pattern created within a medium when the vibrational frequency of the source causes reflected waves from one end of the medium to interfere with incident waves from the source
19. The sensation of a frequency
20. a wave that is not capable of transmitting its energy through a vacuum
21. a substance or material that can carry a wave

1. a property applying to transverse waves that specifies the geometrical orientation of the oscillations
3. the entire distribution of electromagnetic radiation according to frequency or wavelength
4. the reflection of light or other waves or particles from a surface such that a ray incident on the surface is scattered at many angles rather than at just one angle
5. the reduction of an item's density, the opposite of compression
6. the change in the direction of a wavefront at the interface between two different media, bouncing the wavefront back into the original medium
9. the change in direction of a wave passing from one medium to another caused by its change in speed
10. light that has the same wavelength so it is one color
12. waves in which the vibration of the medium is parallel to the direction the wave travels and displacement of the medium is in the same direction of the wave propagation
13. the pulsation caused by the combination of two waves of slightly different frequencies
15. elatively large selective response of an object or a system that vibrates in step or phase, with an externally applied oscillatory force