A TV satelite dish is designed to receive waves of waavelength 3.9 meters What is the frequency of the waves it broadcasts?
Give you answer in MHz = 106 Hz|||The waves received will be electromagnetic waves, which always have a speed of v = 3.00 x 10^8 m/s.
For any wave, v = f位, speed = frequency times wavelength. So f = v/位
= (3.00 x 10^8 m/s)/(3.9 m)
= 7.69 x 10^7 Hz
= 76.9 MHz.
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