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The wavelength involved in the spectrum ...

The wavelength involved in the spectrum of deuterium `_(1)^(2)D` are slightly different from that of hydrogen spectrum because

A

the size of the nuclei are different

B

the nuclear forces are different in two cases

C

the mases of the two nuclei are different

D

the attraction and the nucelus is different in the two cases

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The correct Answer is:
C
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