The de Broglie wavelengths for an electron and a photon are $\lambda$e and $\lambda$p respectively. For the same kinetic energy of electron and photon, which of the following presents the correct relation between the de Broglie wavelengths of two ?
Solution
<p>${\lambda _p} = {h \over p} = {{hc} \over E}$ ...... (i)</p>
<p>${\lambda _e} = {h \over {\sqrt {2mE} }}$ ...... (ii)</p>
<p>From (i) and (ii)</p>
<p>${\lambda _p} \propto \lambda _e^2$</p>
About this question
Subject: Physics · Chapter: Dual Nature of Matter and Radiation · Topic: Photoelectric Effect
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