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Chemistry-

General

Easy

Question

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

$λ_{3} = λ_{1} + λ_{2}$
$λ_{3} = \frac{λ_{1} λ_{2}}{λ_{1} + λ_{2}}$
$λ_{1} + λ_{2} + λ_{3} = 0$
$λ_{3}^{2} = λ_{1}^{2} + λ_{2}^{2}$

The correct answer is: $lambda subscript 3 end subscript equals fraction numerator lambda subscript 1 end subscript lambda subscript 2 end subscript over denominator lambda subscript 1 end subscript plus lambda subscript 2 end subscript end fraction$

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