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  4. Neglecting variation of mass with velocity, the wavelength associated with an electron having a kinetic energy E is proportional to

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Q. Neglecting variation of mass with velocity, the wavelength associated with an electron having a kinetic energy $E$ is proportional to

Dual Nature of Radiation and Matter

Solution:

$\lambda=\frac{h}{\sqrt{2 m E}}$
$\therefore \lambda \propto E^{-1 / 2}$