u = 75 MHz is the frequency at which the radio station is transmitting;
v = 3 * 10 ^ 8 meters per second – the speed of electromagnetic waves.
It is required to determine l (meter) – the wavelength.
Let’s convert the units of measurement of frequency from megahertz to hertz:
u = 75 MHz = 75 * 10 ^ 6 Hertz.
Then the length of the electromagnetic wave will be equal to:
l = v / u = 3 * 10 ^ 8 / (75 * 10 ^ 6) = 300 * 10 ^ 6 / (75 * 10 ^ 6) = 300/75 = 4 meters.
Answer: the length of the electromagnetic wave is 4 meters (OCHV range).
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