The wavelengths involved in the spectrum of deuterium ( ^2_1D ) are slightly different from that of hydrogen spectrum, because: - Physics MCQ AIEEE 2003 2026 | ExamTest.live

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The wavelengths involved in the spectrum of deuterium (_{1}^{2} D) are slightly different from that of hydrogen spectrum, because:

A $size of the two nuclei are different$
B $nuclear forces are different in the two cases$
C $masses of the two nuclei are different$
D $attraction between the electron and the nucleus is different in the two cases$

Solution & Step-by-step Explanation

The Rydberg constant depends on the reduced mass of the electron-nucleus system. Since the mass of the deuterium nucleus is approximately twice that of the hydrogen nucleus, their reduced masses differ slightly, leading to shifts in the spectral wavelengths.

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The wavelengths involved in the spectrum of deuterium (_{1}^{2} D) are slightly different from that of hydrogen spectrum, because:

size of the two nuclei are different

nuclear forces are different in the two cases

masses of the two nuclei are different

attraction between the electron and the nucleus is different in the two cases

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