The frequency of incident photon so that the atom makes a transition f – McqOptions

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1.	The frequency of incident photon so that the atom makes a transition from E1 to E2 should be __________
A.	E2 – E1
B.	E2 – E1/c
C.	E2 – E1/h
D.	E2 – E1/λ
Answer» D.

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