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Electrons with de-Broglie wavelength falls on the target in an x-ray tube. The cut- off wavelength of the emitted X-ray is
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Correct option is A
P=hλ kE=P22m=h22mλ2=hcλ0
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An electron is orbiting in 4th energy state in a hydrogen atom. The de-Broglie wavelength associated with this electron is nearly equal to
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