NEET PhysicsClass 12Line spectra of the hydrogen atomMediumSingle correct

A sample of hydrogen atoms is excited so that every atom reaches the n = 4 level. As the atoms return to the ground state by every possible route, how many different spectral lines can appear, and which transition gives the longest wavelength?

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A sample of hydrogen atoms is excited so that every atom reaches the n = 4 level. As the atoms return to the ground state by every possible route, how many different spectral lines can appear, and which transition gives the longest wavelength?

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