Frequency is expressed as:
, where vis the velocity of an electromagnetic wave and λ is the wavelength.
The velocity of an electromagnetic wave is, v = c = 3.0 × 108 m/s
(a) What is the frequency of an electromagnetic wave with a wavelength of 20 cm?
(b) What would be the wavelength of a sound wave in water with the same frequency as the electromagnetic wave of part a?
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