Energy levels A, B and C of a certain atom corresponding to increasing values of energy i.e. EA < EB < EC. If $\lambda $1, $\lambda $2 and $\lambda $3 are wavelengths of radioations corresponding to transitions C to B, B to A and C to A respectively, which of the following relations is correct?

Question

Energy levels A, B and C of a certain atom corresponding to increasing values of energy i.e. E_A < E_B < E_C. If $\lambda $₁, $\lambda $₂ and $\lambda $₃ are wavelengths of radioations corresponding to transitions C to B, B to A and C to A respectively, which of the following relations is correct?

${\lambda _3} = {\lambda _1} + {\lambda _2}$

${\lambda _3} = {{{\lambda _1}{\lambda _2}} \over {{\lambda _1} + {\lambda _2}}}$

${\lambda _1} + {\lambda _2} + {\lambda _3} = 0$

${\lambda _3}^2 = {\lambda _1}^2 + {\lambda _2}^2$

Solution

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