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3 Cards in this Set
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- Back
- 3rd side (hint)
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Doppler Effect |
The change in the observed frequency of a wave when the source or detector moves relative to the transmitting medium. |
Wave |
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Redshift |
The shift in the position of spectral lines to longer wavelengths due to the relative motion of a source away from the observer. |
Longer wavelengths |
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Ultrasound or ultrasonic wave |
Are sound waves with a frequency greater than 20000 hz |
Sonar |
