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8th Energy & Waves
Term | Definition |
---|---|
waves | a disturbance that transfers energy from one place to another; do NOT transfer matter ONLY energy |
transverse waves | mechanical waves that travel through matter; through a medium(water, air, electric fields, magnetic fields) |
electromagnetic waves | transverse waves or light waves that travel through empty space or matter/medium |
medium | the substance that carries the wave; it can change the direction and speed of the wave |
crest | highest point of the wave from equilibrium (opposite to trough) |
trough | the lowest point of the wave from equilibrium (opposite to crest) |
wavelength | 𝜆, is the distance between two successive crests or troughs in a wave; unit for wavelength is meter |
amplitude | 𝐴, is the maximal distance that a particle in the medium is displaced from its equilibrium position; unit for amplitude is meter |
frequency | 𝑓, is the number of complete wave cycles per unit time; measured in hertz(cycles per second) |