In Bohr's model, if the atomic radius of the first orbit is \( r_{0} \), then the radius of the ...

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In Bohr's model, if the atomic radius of the first orbit is \( r_{0} \), then the radius of the fourth orbit is
(A) \( r_{0} \)
(B) \( 4 r_{0} \)
(C) \( r_{0} / 16 \)
(D) \( 16 r_{0} \)
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