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Henry Moseley studied characteristic X-ray spectra of elements. The graph which represents his observation correctly is
Given $$\nu$$ = Frequency of X-ray emitted, $$Z$$ = Atomic number
According to Moseley’s law:
$$\sqrt{\nu} \propto Z$$
or
$$\nu \propto Z^2$$
where
$$\nu = \text{frequency of characteristic X-rays}$$
and
$$Z = \text{atomic number}$$
Therefore:
- A plot of $$\sqrt{\nu}$$ versus $$Z$$ gives a straight line.
- A plot of $$\nu$$ versus $$Z$$ gives a parabola.
Hence the correct graph is:
Option C
i.e. the graph $$\sqrt{\nu}$$ versus $$Z$$ gives a straight line.
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