Radiology Questions

ANSWERS FOR RADIOLOGY STUDENTS

Radiology School

  • Reginald says:

    The relationship of the energy of a photon to its frequency is given by
    Planck’s equation, E = hf, where E is the energy, f is the frequency
    and h is Planck’s constant, which is 6.625 * 10**-34 joule-seconds.
    Since 6.28 * 10**18 electron-volts equal one joule we can convert h
    from joule-seconds to electron-volt-seconds by multiplying it by
    6.28 * 10**18, giving us a value for h of 4.16 * 10**-15 e-v-s.
    Since E = hf, we find f by dividing E by h. E is given as 150,000 e-v
    or 15 * 10**4 e-v, so f = (15 * 10**4) / (4.16 * 10**-14) = 3.605 * 10**19
    The frequency is 3.605 * 10**19 hertz.
    Hope this answers your question.

    October 25, 2009 at 11:24 pm

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