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jonathan pak ch. 20
| Question | Answer |
|---|---|
| Wave | any disturbance that transmits energy through matter or space |
| Medium | substance through which a wave can travel |
| Energy transfers through a medium | when a particle vibrates it can pass its energy to a particle next to it. Then the particle will begin to vibrate as well. |
| Sound waves work | require a medium, travels by the vibration of particles in liquids, solids, and gases |
| Ocean waves transfer energy | by traveling through water. Waves that require a medium are called mechanical waves. |
| Electromagnetic waves | waves that do not require a medium |
| 5 examples of electromagnetic waves | light from the sun, microwaves, TV and radio signals, X rays used by doctors and dentists |
| Waves are classified | based on the direction in which the particles of the medium vibrate compared with the direction in which the wave travels |
| Transfer waves | vibrate with an up and down motion |
| Longitudinal waves | the particles of the medium vibrate back and forth along the path that the wave travels |
| Amplitude | the maximum distance the wave vibrates from its rest position |
| Wavelength | distance between any two adjacent crests or compressions in a series of waves |
| Frequency | the number of waves produced in a given amount of time |
| Wave speed | the speed at which a wave travels |
| Wave speed formula | v |
| Reflection | occurs when a wave bounces back after striking a barrier |
| Refraction | the bending of a wave as it passes at an angle from one medium to another |
| Diffraction | the bending of waves around a barrier or through an opening |
| Interference | the result of two or more waves overlapping |