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What is de-Broglie wavelength of an atom...

What is de-Broglie wavelength of an atom of mass m, moving at absolute temperature TK.

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`lambda=h/(sqrt(2mK))=h/(sqrt(2m(3/2kT)))=h/(sqrt(3mkT))`,
where k is Boltzmann constant.
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PRADEEP-DUAL NATURE OF RADIATION AND MATTER-Exercise
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