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science 6
Waves
| Term | Definition |
|---|---|
| Wave | a disturbance that transmits energy through matter or empty space |
| medium | the substance that a wave travels through |
| Mechanical Wave | waves that need a medium to travel through |
| Electromagnetic Waves | waves that DO NOT need a medium to travel through |
| Crest | The highest points of a wave |
| Trough | lowest points of a wave |
| Amplitude | wave height, measured from rest position to crest or trough |
| Wavelength | The distance between two crests of two troughs |
| Frequency | The number of waves produced in a given time. |
| Reflection | When a wave bounces back after hitting a barrier |
| Refraction | The bending of a wave when it passes through one medium to another at an angle |
| Diffraction | The bending of waves around a barrier or an opening |
| Interference | when 2 or more waves overlap |
| destructive interference | if 2 waves have the same amplitude or height and they cancel each other out. |
| Constructive interference | when 2 crest overlap and result in a wave with larger amplitude, and has more energy. |