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

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Correct answer: B. 823 ~nm

The largest wavelength in the ultraviolet region of the hydrogen spectrum corresponds to the transition

n=2

to

n=1

. That is, The largest wavelength in the ultraviolet region of the hydrogen spectrum is 122 ~nm . The smallest wavelength in the

The transition from

n=\infty

to

n=3

will produce the smallest wavelength in infrared region of the hydrogen spectrum. So, The largest wavelength in the ultraviolet region of the hydrogen spectrum is 122 ~nm . The smallest wavelength in the

Equations (i) and (ii) gives

\lambda=823.5 \mathrm{~nm}

The largest wavelength in the ultraviolet region of the hydrogen...

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