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A radar installation that is used to track airplanes transmits electromagnetic radiation with a wavelength of 4 cm. Calculate the frequency of this radiation in Hz.

Calculate the time required for a pulse of radar waves to reach an airplane 4.0 km away and return.

  • physics -

    f=c/λ=3•10^8/0.04 =7.5•10^9 Hz.
    t=s/v=s/c= 4000/3•10^8 =1.33•10^-5 s.

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