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A radar operates at a wavelength lambda ...

A radar operates at a wavelength `lambda = 50.0 cm`. Find the velocity of an approaching aircraff if the beat frequency between the transmitted signal and the signal reflected form the aircraft is equal to `Deltav = 1.00 kHz` at the radar location.

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From the previous problem, the beat frequency is clearly
`Deltav = v_(0)(2v)/(c ) = 2v//(c//v_(0)) = 2v//lambda_(9)`
Hence `v = (1)/(2) lambda Delta v = (10^(+3))/(2) xx 50cm//sec = 900 km// hour`
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