The wavelength $\lambda $e of an electron and $\lambda $p of a photon of same energy E are related by

Question

The wavelength $\lambda $_e of an electron and $\lambda $_p of a photon of same energy E are related by

${\lambda _p} \propto \sqrt {{\lambda _e}} $

${\lambda _p} \propto {1 \over {\sqrt {{\lambda _e}} }}$

${\lambda _p} \propto {\lambda _e}^2$

${\lambda _p} \propto {\lambda _e}$

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