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A certain radar installation used to track airplanes transmits electromagnetic radiation of wavelength 7 cm.

(a) What is the frequency of this radiation, measured in billions of hertz (GHz)? __________GHz

(b) What is the time required for a pulse of radar waves to reach an airplane 3 km away and return? ________s

  • physics -

    a) use the wave equation
    frequency*wavelength=speed of light

    b) time= 2*3km/speedlght

  • physics -

    What is the time required for a pulse of radar waves to reach an airplane 7 km away and return?

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