The intensity of X- ray from a coolidge tube is plotted againest wavelength `lambda` as shown in the figure . The minimum wavelength found `lambda_(c)` and the wavelength of the` k_(a)` line is `lambda_(lambda)`, As the accelerating voliage is increase

Options

A. `lambda_(k)-lambda_(c)` increases
B. `lambda_(k)-lambda_(c)` decreases
C. `lambda_(k)` increases
D. `lambda_(k)` decreases

Answer

A

Explanation

As `lambda_(min)=(hc)/(eV) as V "increase"` lambda_("min")` decrease but the pack of characteristic `x`-rays spectrum remains unchanged.