QJEEM21Phc784: JEE Main 2021 Physics - Class 12 JEEM21Phc784 Solution: An electron having de-Broglie wavelength λ is incident on a…

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An electron having de-Broglie wavelength

λ

is incident on a target in a X-ray tube. Cut-off wavelength of emitted X-ray is :

Accepted Answer

λ = \frac{h}{m v}

kinetic energy,

\frac{P^{2}}{2 m} = \frac{h^{2}}{2 m λ^{2}} = \frac{h c}{λ_{c}}

λ_{c} = \frac{2 m c λ^{2}}{h}

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