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    Energies of Various Photons

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    In the following express your answer in terms of eV/c and kg m/s. For photons, you may used the expression E=pc. Find the momentum of:
    a) 10.0 MeV gamma ray
    b) 25 keV X-ray
    c) 1.0 micro m infrared photon
    d) 150 MHz radio wave photon

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    Solution Preview

    a) Since a gamma ray is a photon, its momentum is given by p = E/c. Thus a 10.0 MeV gamma ray has a momentum of 10.0 MeV/c.

    b) ...

    Solution Summary

    In this solution, we compute the energies of various photons of given wavelengths or frequencies.