7. Partciles, Waves, and     Paradoxes   Previous PageNext Page
    Particles of Light

It is an important observation that all electromagnetic radiation, radio waves through gamma rays, moves at the same universal speed. This is the speed of light, c = 3 x 10 or 30,000,000,000 centimeters per second. For any such radiation we can write

= c = 3 x 10 cm .


Because the speed of light is constant, if we know either the frequency or the wavelength of electromagnetic radiation we can calculate the other quantity.

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