The wavelength of the energy emitted when electron comes from fourth orbit to second orbit in hydrogen is 20.397 cm. The wavelength of energy for the same transition in He+ is

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Q: The wavelength of the energy emitted when electron comes from fourth orbit to second orbit in hydrogen is 20.397 cm. The wavelength of energy for the same transition in He+ is

(a) 5.099 cm-1

(b) 20.497 cm-1

(c) 40.994 cm-1

(d) 81.988 cm-1

Ans: (a)

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