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Waves Vocabulary
Patterson CLHS - Waves and Sound Terms
Question | Answer |
---|---|
# of waves / # of seconds | frequency |
Time for 1 wave to go by | period |
One of 2 main categories of waves. This category requires a medium. | mechanical wave |
A category of waves that can travel with no medium | electromagnetic wave |
height or displacement from equilibrium | amplitude |
The vibration is parallel to energy travel | longitudinal wave |
The Vibration is perpendicular to energy travel | transverse wave |
Distance between crests | wavelength |
Highest point of the wave | crest |
Lowest point of the wave | trough |
Wave bounces away at the same angle if it hits a barrier | reflection |
Wave bends as it goes through a different medium | refraction |
Vibration caused by another object vibrating at that same frequency | resonance |
Wave bends as it goes through an opening | diffraction |
Sum OR difference of amplitudes, due to wave interference | Superposition Principle |
Resultant wave has larger amplitude | constructive interference |
Resultant wave has smaller amplitude | destructive interference |
Two identical waves in opposite directions through same medium | standing wave |
Stationary locations on a standing wave | nodes |
Moving locations on a standing wave | anti-nodes |
Symmetrical motion around an equilibrium position | simple harmonic motion |
Apparent frequency shift due to relative motion between the wave source and the observer | Doppler effect |
Gets larger if amplitude is larger | loudness of sound |
Gets higher if frequency is higher | pitch of sound |
The relationship between f and T | inverse |
Also called compression type | longitudinal wave |
Larger through solids | speed of sound |