How many different wavelengths may be ob...

How many different wavelengths may be observed in the spectrum form a hydrogen sample, if the atoms are excited to third excited state?

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The number of different wavelengths may be observed in the spectrum from a hydrogen sample if the atoms are excited to third excited state is

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Hydrogen atom in its ground state is excited by means of a monochromatic radiation of wavelength 970.6 Å . Different wavelengths are possible in the spectrum. After absorbing the energy of radiation, hydrogen atom goes to the excited state. After 10^(-8) s, the hydrogen atom will come to the ground state by emitting the absorbed energy. Number of different wavelengths present in the spectrum

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