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Calculate the ratio of the radius of 1^(...

Calculate the ratio of the radius of `1^(st)` orbit of H atom to thatof`4^(th)`orbit.
Hint `: r_(n) prop ( n)^(2)`

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Verified by Experts

`R_(n ) prop ( n^2)`
` (r_(1))/(r_(4)) =(1)/(16)`
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