Question

What is the relationship between radius of bohr orbit and principal quantum number?

Answer 1

Enclosed is a jpg picture of the equation I think you want ...

Also, a website you might find helpful (it's intended to be)
http://perendis.webs.com

Answer 2

Thanks

Answer 3

Radius of Bohr's orbit is given by
\[r = \frac{n ^{2}h^{2} \epsilon_{0} }{ \pi m e^{2}}\]
where \[ \frac{h^{2} \epsilon_{0} }{ \pi m e^{2}} = constant\] say K
so we can write as
\[r = K n^{2}\]