question_answer

A hydrogen atom, initially in the ground state, is excited by absorbing a photon of wavelength. The radius of the atom in the excited state, in terms of Bohr radius will be [JEE Main 11-Jan-2019 Morning]

A)

B)  

C)  

D)

Correct Answer: B

Solution :

[b] The energy absorbed by the atom is

So,

The radius of  orbit is  So, the radius of atom in excited state is