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calculate the transition probability aik and the natural line width of the transition 3s to 2p...

calculate the transition probability aik and the natural line width of the transition 3s to 2p in the hydrogen atom if the lifetimes of the states t(3s) = 23 ns and t(2p) = 2.1 ns, compare this to the Doppler width of this transition at T = 300k

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