Which one of the following statement is `WRONG` in the context of X- rays generated from X- rays tube ?

Options

A. Wavelength of characteristic X ray decreases when the atomic number of the targer increases
B. Cut off wavelength of the continous X rays depends on the atomic number of the target
C. Intensity of the characteristics X rays depends on the electric power given to the X - ray tube
D. Cut off wavelength of the continous X - rays depends on the energy of the electrons in the X rays tube .

Answer

B

Explanation

For continuous X rays , the cut off wavelength `lamda_("min") = (hC)/(eV)` where V is the accelerating potential . Thus it does not depend upon the atomic number (Z) of the target .
Thus option (b) is wrong .