A) \[81,988c{{m}^{-1}}\]
B) \[40,994c{{m}^{-1}}\]
C) \[20,497c{{m}^{-1}}\]
D) \[5,099\text{ }c{{m}^{-1}}\]
Correct Answer: D
Solution :
As \[\lambda \propto \frac{1}{{{Z}^{2}}}\] Hence wavelength of energy for same transition in He is, here Z = 2 hence, \[\frac{20397}{4}=5099\text{ }c{{m}^{-1}}\]
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