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Question: Energy levels A, B and C of a certain atom correspond to increasing values of energy, i.e., E<sub>A<...

Energy levels A, B and C of a certain atom correspond to increasing values of energy, i.e., EA< EB< EC. If l1, l2 and l3 are wavelengths corresponding to transitions C to B, B to A and C to A respectively then –

A

l3 = l1 + l2

B

l3 = λ1λ2λ1+λ2\frac{\lambda_{1}\lambda_{2}}{\lambda_{1} + \lambda_{2}}

C

l1 + l2 + l3 = 0

D

l32 = l12+ l22

Answer

l3 = λ1λ2λ1+λ2\frac{\lambda_{1}\lambda_{2}}{\lambda_{1} + \lambda_{2}}

Explanation

Solution

EC – EA = EC – EB + EB – EAŽhcλ3\frac{hc}{\lambda_{3}}= hcλ1\frac{hc}{\lambda_{1}} + hcλ2\frac{hc}{\lambda_{2}}