PhysicsMedium145×since 2002Q6538Both the nucleus and the atom of some element arein their respective first excited states. They get de-excted by emitting photons of wavelengths ^λ\lambdaλN, ^λ\lambdaλA respectively. The ratio λNλA{{{}^\lambda N} \over {{}^\lambda A}}λAλNis closest to :A10^−-−6B10C10^−-−10D10^−-−1Check answerSkip