The wavelengths involved in the spectrum of deuterium $\left({ }_1^2 \mathrm{D}\right)$ are slightly…

The wavelengths involved in the spectrum of deuterium $\left({ }_1^2 \mathrm{D}\right)$ are slightly different from that of hydrogen spectrum, because
  1. the size of the two nuclei are different
  2. the nuclear forces are different in the two cases
  3. the masses of the two nuclei are different
  4. the attraction between the electron and the nucleus is different in the two cases

Solution

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Asked in: JEE Main 2003

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