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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 wavelengths corresponding to transitions C to B, B to A and C to A respectively then

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A
λ3=λ1+λ2
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B
λ3=λ1λ2λ1+λ2
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C
λ1+λ2+λ3=0
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D
λ23=λ21+λ22
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Solution

The correct option is B λ3=λ1λ2λ1+λ2
ECEA=ECEB+EBEA
hcλ3=hcλ1+hcλ2or1λ3=1λ1+1λ1

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