Modern Physics> Sir , jee mains 2 nd shift april 12 quest...

Sir , jee mains 2 nd shift april 12 question from atoms and nuclei , what is its answer? Can u plz help me out?

abhishek premerajan , 6 Years ago

Grade 12th pass

1 Answers

sree lakshmi

Last Activity: 6 Years ago

Electron in hydrogen atom first jumps from third excited state to second excited state and then from second excited to the first excited state. The ratio of the wavelengths λ1:λ2 emitted in the two cases is

ans; 1^st the electron jumps from 3^rd excited state to the 2^nd ie from n=4 to n=3

then 1/λ1 =R(1/n_{1^{2 -1/n}2^{2 )= R ( 1/9 – 1/16) =R (7/144)}}

_{^{similarly 1/}}λ2 = R ( ¼ – 1/9 )=R(5/36)

∴ λ1/λ2 = 1/R(144/7) * R (5/36) =4*5/7 =20/7

so the ans is 20/7

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Modern Physics> Sir , jee mains 2 nd shift april 12 quest...

Sir , jee mains 2 nd shift april 12 question from atoms and nuclei , what is its answer? Can u plz help me out?

abhishek premerajan , 6 Years ago

sree lakshmi

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