Monochromatic radiation of wavelength la...

Monochromatic radiation of wavelength `lambda` is incident on a hydrogen sample in ground state. Hydrogen atoms absorb a fraction of light and subsequently emit radiations of six different wavelength . Find the wavelength `lambda`.

80nm

97.5nm

105nm

60nm

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The correct Answer is:

The atom is excited to n =3 state
`(hc)/(lambda)=E_(4) -E_(1) =12.75eV rArr lambda =97.6nm`

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