The intensity of X-rays form a Coolidge tube is plotted against wavelength `lambda` as shown in the figure. The minimum wavelength found is `lambda_c` and the wavelength of the `K_(alpha)` line is `lambda_k`. As the accelerating voltage is increased
(a) `lambda_k - lambda_c` increases (b) `lambda_k - lambda_c` decreases
(c ) `lambda_k` increases (d) `lambda_k` decreases

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 accelerating voltage is increased
`lambda_(c)` decreases, `lambda_(k)` remains same, `(lambda_(k)-lambda_(c))` increases