In terms of Bohr radius a, the radius of the second Bohr orbit of a hydrogen atom is given by …………

Options

A. `4a_(0)`
B. `8a_(0)`
C. `sqrt2a_(0)`
D. `2a_(0)`

Answer

A

Explanation

Radius in `n^(th)` orbit `r_(n)propn^(2)` here n=2
`:.(r_(2))/(r_(1))=((2)^(2))/((1)^(2))`
`(r_(2))/(a_(0))=4`
`:.r_(2)=4a_(0)`