Photoelectric EffectHard

Question

Energy levels A, B and C of a certain atom correspond to increasing values of energy, i.e. EA < EB < EC. If λ1, λ2 and λ3 are the wavelengths of radiations corresponding to transitions C to B, B to A and C to A respectively, which of the following relations is correct ?

Options

A.λ3 = λ1 + λ2
B.λ3 =
C.λ1 + λ2 + λ3 = 0
D.λ32 = λ12 + λ22

Solution

EC − EA = (EC − EA) + (EB − EA)
⇒   
⇒    λ3 =

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