JEE Advanced 2007 Physics question

The largest wavelength in the ultraviolet region of the hydrogen spectrum is 122 nm. The smallest wavelength in the infrared region of the hydrogen spectrum (to the nearest integer) is

(A)802 nm
(B)823 nmCorrect
(C)1882 nm
(D)1648 nm

Answer: (B)

Solution

The largest UV wavelength is the first Lyman line (2 → 1): , so nm. The

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Question ID VK-037412