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19/08/2021 11:58 am
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If radius of second stationary orbit (in Bohr's atom) is R then radius of third orbit will be:
(a) R/3
(b) 9 R
(c) R/9
(d) 2.25 R
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19/08/2021 12:18 pm
Correct answer: (d) 2.25 R
Explanation:
\(\frac{r_1}{r_2}\) = \(\Big(\frac{n_1}{n_2}\Big)^2\)
\(\frac{R_1}{R}\) = \(\frac{4}{9}\)
\(R_1\) = \(\frac{9R}{4}\)
\(R_1\) = 2.25 R