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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 |