Which one of the following statements in incorrect in the context of X-rays generated from an X-ray tube?
A)Wavelength of characteristic X-rays decreases when the atomic number of the target increases.
B) Cut-off wavelength of the continuous X-rays depends on the atomic number of the target.
C) Intensity of the characteristic X-rays depends on the electric power given to the X-ray tube.
D) Cut-off wavelength of the continuous X-rays depends on the energy of the electrons in the X-ray tube.

Dear Student,

The minimum (cut-off) wavelength of the characteristic X-rays emitted when electrons incident on the target are accelerated through a potential V is given by
λmin=hceV
which is independent of Z, the atomic number of the target. Hence, statement (B) is wrong.

Regards

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