Dual Nature Of Light Question 463

Question: Mosley’s law relates the frequencies of line X-rays with the following characteristics of the target element [CPMT 1980; NCERT 1985]

Options:

A) Its density

B) Its atomic weight

C) Its atomic number

D) Interplaner spacing of the atomic planes

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Answer:

Correct Answer: C

Solution:

$ \nu \propto {{(Z-b)}^{2}},\Rightarrow ,\nu =a,{{(Z-b)}^{2}} $ Z = atomic number of element (a, b are constant).