Q190 / 225 · JEE Main 2005 · Physics

If the kinetic energy of a free electron doubles. Its deBroglie wavelength changes by the factor

A
$\frac{1}{2}$
B
2
Correct answer
C
$\frac{1}{\sqrt{2}}$
D
$\sqrt{2}$

Solution

$\lambda=\frac{\mathrm{h}}{\sqrt{2 \mathrm{Km}}}$

Hence, the correct answer is option: 'C'.

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