The number of wave crests that pass a point in one second. - Frequency, The distance between two consecutive crests or troughs of a wave. - Wavelength, How fast the wave travels, equal to the speed of light in a vacuum. - Speed, The component of an EM wave that oscillates perpendicular to the direction of wave propagation. - Electric Field, The component of an EM wave that oscillates perpendicular to both the electric field and the direction of wave propagation. - Magnetic Field,

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