Hydrogen atom absorbs radiations of wavelength `lambda_0` and consequently emit radiations of 6 different wavelengths, of which two wavelengths are longer than `lambda_0`. Chosses the correct alternative(s).

Options

A. the final excited state of the atom is `n=4`
B. the initial state of the atom may be `n=2`
C. the initial state of the atoms may be `n=3`
D. there are three transition belonging to Lyman series

Answer

A, B, C

Explanation

`n(n-1)/2=6Rightarrow n=4`
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If the initial state were `n=3,` in the emission spectrum , no wavelength shorter than `lambda_(0)` state were `n=2`.