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Physics 40S
Unit 1 - Waves
Question | Answer |
---|---|
Wave | Disturbance that carries energy through matter and space without moving matter |
Transverse Waves | Mechanical wave that vibrates purpendicular to direction of waves motion |
Trough | Low piont of a wave |
Crest | Highest piont of wave |
Longitudinal Wave | Mechanical wave which distubence is in the same direction or parrell to waves motion |
Frequency | Number of complete oscillations that a wave makes per SECOND |
Time Period | The time it takes to complete of complete cycle |
Wavelength | The mesurement of a complete wave. Starting at any piont. Trough to Trough, Crest to Crest. so on... |
Amplitude | The highest or lowest piont of a wave. |
Wave Velocity | The speed of one full cycle of a wave. |
Refraction | Change in direction when faces with two different mediums. |
More energy results as | Louder Volume |
Interference | Two waves Meet |
Constructive interference | Wave displacement in opposite direction |
Destructive interference | Wave displacement in same direction. Equal but different wave lengths. |
Standing Waves | Wave that appears to be standing still. Caused by two interfering waves moving in opposite direction. |
Nodes | Stationary piont in a standing wave: Have a displacement of 0 |
antinodes | Largest piont of a standing wave. Where the two waves meet. |
Super Crest/Trough | Where to waves meet and there crest/trough is doubled |
Ultra/Infra sound | The Hz that the human ear can;t ear. Ultra 20000Hz and Infra 20Hz |
Ultra Violet | Wavelength that is shorter then visable light |
Infra Red | Thermal waves |
Simple Harmonic Motion | No medium to stop wave |
Damped Harmonic Motion | Medium slows down wave |
Resonane | Where everything has its our frequency. and REsonane is when two things vibrate at the same frequency. |
Characteristics of any medium that determines waves speed | Elasticity & Density |
Two Inferfere waves | destructive interference (Out of phase) |
Constructive interference | In phase |