Assertion (A): Wave number for a particular transition in \( \mathrm{H} \)-like atom from \( 3 \...
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0Assertion (A): Wave number for a particular transition in \( \mathrm{H} \)-like atom from \( 3 \mathrm{rd} \) to 1st orbit may be given as
\[
\bar{v}_{3 \rightarrow 1}=\bar{v}_{3 \rightarrow 2}+\bar{v}_{2 \rightarrow 1}
\]
Reason (R): Wave number for a particular transition in H-like atom can be derived by
\[
\bar{v}=R \times Z^{2}\left[\frac{1}{n_{1}^{2}}-\frac{1}{n_{2}^{2}}\right]
\]
(A) Both A and R are true and R is the correct explanation of A.br(B) Both A and R are true, but R is not the correct explanation of A.
(C) A is true, but R is false.
(D) A is false, but R is true.
(E) Both A and R are false.
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