Question
Solid targets of different elements are bombarded by highly energetic electron beams. The frequency $(f)$ of the characteristic $X-$ rays emitted from different targets varies with atomic number $Z$ as
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Answer
From Mosley law,
$f = a (Z -b)^2$
$f \propto Z^2$
$f = a (Z -b)^2$
$f \propto Z^2$
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