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JEE Main 2014 (9 Apr, Shift 1) · Matter Waves: de Broglie Wavelength

Matter Waves: de Broglie Wavelength question from JEE Main 2014 (9 Apr, Shift 1)

Q136JEE Main 2014 · 9 APR · SHIFT 1Easy

Matter Waves: de Broglie Wavelength

For which of the following particles will it be most difficult to experimentally verify the de-Broglie relationship?

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Answer: (d)

$\lambda = \dfrac{h}{mv}$ : a large mass gives an extremely small wavelength.
A dust particle is far heavier than an electron, proton or $\alpha$ -particle, so its $\lambda$ is too small to detect by diffraction.
So the answer is (d) a dust particle.

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