NEET Practice Questions

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NEET, 2016

Electrons of mass m with de-Brogile wavelength λ fall on the target in an X-ray tube. The cut off wavelength λ0 of the emitted X-ray is

(a) λ0=2mcλ2h          (b) λ0=2hmc

(c) λ0=2m2c2λ3h2       (d) λ0=λ