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Q)

If the KE of a free electron doubles, its de-Broglie wavelength changes by the factor

$\begin {array} {1 1} (a)\;\large\frac{1}{\sqrt 2} & \quad (b)\;\sqrt 2 \\ (c)\;\large\frac{1}{2} & \quad (d)\;2 \end {array}$

 

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