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A hydrogen atom initially in the ground state absorbs a photon which excites it to n = 4 level.

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A hydrogen atom initially in the ground state absorbs a photon which excites it to n = 4 level. When it gets de- excited, find the maximum number of lines which are emitted by the atom. Identify the series to which these lines belong. Which of them has the shortest wavelength?

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Best answer

= 975A0 Belong to Lyman series The possible transitions are 

∴ Total number of transitions = 6, as shown in Fig. 

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