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Spatial Light
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2. Waves, the Wave Equation, and Phase Velocity
web.pa.msu.edulight electric field. The speed of light in vacuum, usually called “c”, is 3 x 10. 10. cm/s. A simpler equation for a harmonic wave: E ... Spatial quantities: Temporal quantities: The Phase Velocity How fast is the wave traveling? Velocity is a reference distance. divided by a reference time. ...