Q. The frequency of light emitted for the transition n = 4 to n = 2 of He+ is equal to the transition in H atom corresponding to which of the following
A. n = 4 to n = 3
B. n = 3 to n = 1
C. n = 2 to n = 1
D. n = 3 to n = 2
Answer: n = 2 to n = 1
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