25.4 and 25.5 Frequency, wavelength, and the
20 * The electric field in a sinusoidal wave changes as
(a) In what direction does the wave propagate? (b) What is the amplitude of the electric field oscillations? (c) What is the amplitude of the magnetic field oscillations? (d) What is the frequency of the wave? (e) What is the wavelength? (f) What is the speed? (g) What other information can you infer from the equation?
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