In the ground state, the electron in the hydrogen atom moves in a circular orbit of radius `r_0` . When the hydrogen atom goes in the second excited state, the radius of the electron orbit is increased by

Options

A. `3r_0`
B. `8r_0`
C. `6r_0`
D. `5r_0`

Answer

B

Explanation

For second excited state n=3
`therefore r_n = n^2r_0 = 9 r_0 therefore r_3-r_0 = 8r_0`