Question

The radius of electron's second stationary orbit in Bohr's atom is R. The radius of 3^rd orbit will be:-

Options

• 2.25 R

• 2.5 R

• 1.25 R

• 1.5 R

Answer 1

2.25 R

Explanation:

As radius is `oo  n^2`

∴ `r_2/r_3 = 4/9`

⇒ `r_3 = 9/4 R` = 2.25 R