In Bohr model of atom, radius of hydrogen atom in ground state is r, and radius of He+ ion in ground state is r2. Which of the following is correct ?
1
\(\rm \frac{r_1}{r_2}=4\)
2
\(\rm \frac{r_1}{r_2}=\frac{1}{2}\)
3
\(\rm \frac{r_1}{r_2}=\frac{1}{4}\)
4
\(\rm \frac{r_2}{r_1}=\frac{1}{2}\)