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Science- Book O Ch.1
Ch.1- Energy of Waves
| Question | Answer |
|---|---|
| What is a wave? | -Travels through medium -Any disturbance that transmits energy trough matter or empty space. |
| What is a medium | Substance in which a wave can travel |
| What is a mechanical wave | Waves that need a medium. (will not transfer energy without one) |
| What is an example of electromagnetic waves | Visible light, microwave made by microwave ovens |
| What kind of waves do not need a medium? | Electromagnetic waves |
| What are the 2 types of waves | Transverse and longitudinal |
| What are transverse waves | Wave in which the particles in that wave move perpendicularly |
| What are longitudinal waves | Waves in which the particles in that wave move back and forth/parallel |
| What is a crest | Highest point of transverse wave (top part) |
| What is a trough | Low point of transverse wave |
| Surface wave | When a transverse wave and longitudinal wave combine |
| Difference between transverse and longitudinal waves | These waves are different because the particles move/vibrate in different directions. Transverse= Vibrate in a perpendicular motion longitudinal= back and forth/parallel motion |
| wave speed formula | V = y x f Y is upside down |
| wavelength formula | Y = v/f Y is upside down |
| frequency formula | F= v/y Y is upside down |
| Reflection | When a wave bounces back off a barrier |
| Example of reflection | Mirror reflections, echo |
| Refraction | The bending of a wave as the wave passes from one medium to another at an angle |
| Diffraction | Bending of wave around a barrier or through an opening |
| Example of diffraction | Sound bends around objects. |
| Interference | Result of 2 or more waves overlapping in the same space |
| 2 types of interference | Constructive & destructive |
| Constructive interference | Increases the amplitude |
| Destructive interference | Decreases or cancels the amplitude |
| Standing waves | Looks like loops standing still (one wave overlapping another) |
| Resonance example of music | Your body resonants with the music at the same frequency. |