Sem2 Physics Final Key Points 3
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Created by:
ellenbarhorst on May 26, 2012
Description:
sound waves, light
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20 terms
Terms | Definitions |
|---|---|
 sound waves | longitudinal waves formed by vibrations |
| rarefactions | pulse of low pressure air, spaced out molecules |
| compressions | pulse of compressed air, pushed-together molecules |
| relationship frequency and pitch | high pitched= high frequency low pitched= low frequency |
| doppler effect | wave source approaches, an observer encounters waves with a higher frequency. waves source moves away, an observer encounters waves with lower frequency |
| sound speed with temp and density | higher temp=faster sound lighter density=faster sound |
| forced vibrations | when an object is made to vibrate by another vibrating object nearby |
| resonance | when the frequency of a forced vibration on an object matches the objects natural frequency, equals louder sound/increased amplitude |
| electromagnetic wave | a light wave thats partly electric and partly magnectic produced by accelerating electric charges |
| electromagnetic spectrum | radio, micro, infrared, light, ultraviolet, x-ray, and gamma |
| electromagnetic wave speed | ... |
| red+blue light= | magenta |
| red+green light= | yellow |
| blue+green light= | cyan |
| all light= | white |
| white pigment and black pigment | ... |
| polarization | the aligning of vibrations in a transverse wave, usually by filtering out waves of other directions, |
| law of reflection | angle of reflection=angle of incidence |
| bending light | ... |
| flat mirror images | ... |
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