A gas of hydrogen like atoms are in an unknown energy state of principal quantum number n_1 . They can absorb radiations having photons of energy 68eV. Consequently , the emission spectrum of the gas has only three different lines . All the wavelengths are equal or smaller than that of the absorbed radiation . Assuming Bohr's model to be applicable answer the following question . The initial state n_1 of the gas atoms is

A gas of hydrogen like atoms are in an unknown energy state of princip

1.	A gas of hydrogen like atoms are in an unknown energy state of principal quantum number n_1 . They can absorb radiations having photons of energy 68eV. Consequently , the emission spectrum of the gas has only three different lines . All the wavelengths are equal or smaller than that of the absorbed radiation . Assuming Bohr's model to be applicable answer the following question . The initial state n_1 of the gas atoms is
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