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An electron in hydrogen and one in a singly ionised helium atom are excited to the state n = 2. A photon is emitted when these electrons iump back to the ground state in each case. Then

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there is no definite relation between the radiations emitted by the two atoms

radiation emitted by helium are shifted towards the violet as compared to radiation from hydrogen atom

energy of photon is same in both

radiations emitted by helium atom are shifted towards the red as compared to radiation from hydrogen atom

answer is C.

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Detailed Solution

we know that ${v∝Z}^{2}$ Hence the corresponding lines from helium are more energetic (shifted toward the violet) compared to those from hydrogen,

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