First slide

Bohr Model of the Hydrogen atom.

Question

A hydrogen atom in an excited state emits a photon which has the longest wavelength of the Paschen series. Further emissions from the atom cannot include the

Easy

A

Longest wavelength of the lymann series.
B

Second longest wavelength of the lymann series
C

Longest wavelength of the Balmer series
D

Second longest wavelength of the Balmer series.

Solution

$For Paschen series n_{1} = 3$
$3 \to 2, 2 \to 1 (or) 3 \to 1 are possible but not 4 \to 2 as it is in n = 3 .$

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