Statement I : The energy of a `He^(+)` ion for a given `n` is almost exactly four times that of H atom for the same `n`.
Statement II : Photon emitted during transition between corresponds pair of levels in `He^(+)` and H have the same energy `E` and the same wavelength `lambda = hc//E`.

Options

A. Statement I is True , Statement II is True , Statement II is a correct explanation for Statement I.
B. Statement I is True , Statement II is True , Statement II is NOT a correct explanation for Statement I.
C. Statement I is True , Statement II is False.
D. Statement I is False , Statement II is True.

Answer

A

Explanation

A h atom that drops from `n = 2` level to `n = 1` level emits a photon of energy `10.2 eV` and wavelength `122 nm. A `He^(+)`ionemits a photon of the same energy and wavelength when it drops from `n = 4` level to `n = 2` level.