Question

The given graph shows the variation of $\sqrt{f}$ vs $Z$ for characteristics X-rays. Lines 1, 2, 3, 4 shown in the graph corresponds to any one of $K_{\alpha },K_{\beta },L_{\alpha },L_{\beta },$ then $L_{\beta }$ is represented by $(f=$ frequency, $Z=$ Atomic number$)$

• A. Line 1
• B. Line 2
• C. Line 3
• D. Line 4

Answer 1

The correct option is C Line 3

For a given value of Z, energy of K-series is more than L-series, also $\beta$−line has more energy as compared to $\alpha$−line of L-series.

Hence, $L_{\beta }$ will be represented by line 3.