Q 12-12-049JEE MainJEE Main 2024 (27 Jan, Shift 1)Easy
The radius of third stationary orbit of electron for Bohr's atom is $R$. The radius of fourth stationary orbit will be:
Answer: (B) $\dfrac{16}{9}R$
In Bohr's model $r_n \propto n^2$:
$$\frac{r_4}{r_3} = \frac{16}{9} \;\Rightarrow\; r_4 = \frac{16}{9}R$$
Solution by Sreeraj P, M.Sc Physics