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chapter 20jg
chapter 20 notes
| Question | Answer |
|---|---|
| Wave | any disturbance that transmits energy through matter or space |
| Medium | is a substance through which a wave can travel |
| Energy transfers through a medium | by vibrations of particles |
| Sound waves | travels by the vibrations of particles in liquids, solids, and gases. If there isn’t particles to vibrate no sound is made |
| Ocean waves | are waves that travel through water |
| Electromagnetic waves | are waves that don’t require a medium |
| Electromagnetic waves examples | visible light, TV signals, radio signals, x-rays, and microwave ovens |
| Classifying waves | based on the direction in which that particles of the medium vibrate compared with the direction in which the wave travels |
| Transverse waves | waves in which the particles vibrate in up-and-down motion |
| Longitudinal | 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 |
| Wave length | the distance between any two adjacent crests or compressions in the 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 | wave speed equals wavelength times frequency |
| Reflection | occurs when a wave bounces back after striking a barrier |
| Refraction | is 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 | when two or more waves overlap when they share the same space |