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Matter Waves

Which of thes...

Question

Which of these particles having the same kinetic energy has the largest de Broglie wavelength?

A

Electron

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B

Alpha particle

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C

Proton

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D

Neutron

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Solution

The correct option is D Electron
As $λ = \frac{h}{\sqrt{2 m K}} s o λ \propto \frac{1}{\sqrt{m}}$

Out of the given particles m is least for electron, therefore electron has the largest value of de Broglie wavelength.

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