A certain transition in H spectrum from an excited state to the ground state in one or more steps gives rise to a total of 10 lines. How many of these belong to the UV spectrum?

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Solution

The correct option is B 4
As we know, $n_{1} = 1$
No of lines $= (n_{2} - n_{1} + 1) (n_{2} - n_{1}) / 2 = 10$
$n = 5.$

Four lines are observed in the ultraviolet region of the spectrum. These corresponds to the transitions $5 \to 1, 4 \to 1, 3 \to 1, 2 \to 1$
So, no of lines in U.V. (Lyman series) spectrum = 4.

Hence, the correct option is $B$

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A certain transition in H spectrum from an excited state to the ground state in one or more steps gives rise to a total of 10 lines. How many of these belong to the UV spectrum?

The correct option is B 4As we know, n1=1No of lines =(n2−n1+1)(n2−n1)/2=10n=5.Four lines are observed in the ultraviolet region of the spectrum. These corresponds to the transitions 5→1,4→1,3→1,2→1So, no of lines in U.V. (Lyman series) spectrum = 4.Hence, the correct option is B