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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 |