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Find the ratio of radius of 1st Bohr orbit to that of 4th Bohr orbit.

Find the ratio of radius of 1^st Bohr orbit to that of 4^th Bohr orbit.

Numerical

We know that, r_n ∝ n²

`r_1/r_4=(1/4)^2`

`=1/16`

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Bohr’s Atomic Model

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