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    Modern Physics: Absorption of Mixed Energy Photon Beam

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    A collimated gamma ray beam consists of equal numbers of 0.1 MeV and
    1.0 MeV photons. If the beam enters a 15 cm thick concrete shield, what
    is the relative portion of 1 MeV photons to 0.1 MeV photons in the
    emergent beam?

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    Solution Summary

    A beam consist of photons of different energies incident and obstacle. The ratio of photons in the emerging beam is calculated.