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X-ray spectrum obtained from a metallic ...

X-ray spectrum obtained from a metallic target has been shown in the figure. The spectrum has been obtained for four different accelerating voltages in the X-ray tube: `25 kV`, `20 kV`, `15 kV` and `10 kV`.

(a) Find the value of `lambda_(0)` shown in the graph.
(b) What can you say about the energy of a K-shell electron in the target atom?

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The correct Answer is:
(a) `0.08 nm`
(b) Energy of an electron in `K-`shell lies between `-25 keV` and `-20 keV`.
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