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Intensity-wavelength graph for X-ray

  1. Feb 1, 2016 #1


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    The cut-off wavelength is the minimum wavelength of the X-ray emitted. But doesn't minimum wavelength correspond to maximum energy? Why is intensity zero at minimum wavelength? Shouldn't it be maximum when wavelength is minimum since ##\lambda=\frac{hc}{E}##
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  3. Feb 1, 2016 #2

    Simon Bridge

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    Yes it does.
    Because there are no x-rays emitted at that wavelength.
    Unless you have a special reason to think that more light will be emitted at high energies than low energies.

    I think you may be getting confused between wave a particle models for light - ##E=hc/\lambda## is the energy of an individual photon - the intensity is the number of photons per unit area per unit time. The relation means that it takes fewer short-wavelength photons to produce a high intensity light.
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