Question

For a valid Bohr orbit, its circumfrence should be :

• A. $=n\lambda$
• B. $=(n-1)\lambda$
• C. $>n\lambda$
• D. $<n\lambda$

Answer 1

The correct option is A $=n\lambda$

For a valid Bohr orbit, its circumfrence should be $2\pi r=n\lambda$.
This is obtained from the fact that the angular momentum (mvr) is an integral multiple of $h/2\pi$.
$mvr=\frac{nh}{2\pi }$