An electron having de-Broglie wavelength $\lambda$ is incident on a target in a X-ray tube. Cut-off wavelength of emitted $X$-ray is :
An electron having de-Broglie wavelength $\lambda$ is incident on a target in a X-ray tube. Cut-off wavelength of emitted $X$-ray is :
- A
$0$
- B
$\frac{h c}{m c}$
- C
$\frac{2 m^{2} c^{2} \lambda^{2}}{h^{2}}$
- D
$\frac{2 m c \lambda^{2}}{h}$
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