PhysicsEasy183×since 2002Q5965The wavelengths involved in the spectrum of deuterium (12 D)\left( {{}_1^2\,D} \right)(12D) are slightly different from that of hydrogen spectrum, becauseAthe size of the two nuclei are differentBthe nuclear forces are different in the two casesCthe masses of the two nuclei are differentDthe attraction between the electron and the nucleus is different in the two casesCheck answerSkip