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),

8th gr Waves & Energy

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