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The ratio of areas within the elctron orbits for the first excited state to the ground sate for hydrogen atom is

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The ratio of areas within the elctron orbits for the first excited state to the ground sate for hydrogen atom is
A. `16 : 1`
B. `18 : 1`
C. `4 : 1`
D. `2 : 1`
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Correct Answer - D
`r_(n) prop n^(4) rArr A_(n) prop n^(4) rArr (A_(1))/(A_(0)) = ((2)/(1))^(4) = (16)/(1)`
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