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JEE Main levelOne or more correct optionsDifficulty 2 of 3as087

Select the correct statements about the Lyman series of atomic hydrogen.

AAll its lines arise from transitions that end at $n = 1$
BIts longest-wavelength line is the $n = 3 \to n = 1$ transition
CThe photon energy at the series limit is $10.2 eV$
DAll its lines lie in the ultraviolet region

Answer: A, D

Lyman lines end at

n = 1

and lie in the UV. The longest wavelength is the smallest gap,

2 \to 1

(not

3 \to 1

). The limit is

\infty \to 1

, i.e.

13.6 eV

, not 10.2 eV (that is the

2 \to 1

line).

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