Q144 / 150 · MHT CET 2011 · Physics

When the kinetic energy of an electron is increased the wavelength of the associated wave will

A
increase
Correct answer
B
decrease
C
wavelength does not depends upon kinetic energy
D
None of the above

Solution

$\lambda=\frac{h}{\rho}=\frac{h}{\sqrt{2 m E}}$ $\therefore \quad \lambda=\frac{1}{\sqrt{E}}$

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

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