Hello!!

Shreya

R is your rydgberg constant whose value is 1.1×10^7/m,it depends upon mass ,charge of electron,planks constant, speed of light ,permittivity.

R=2pi^2mk^2e^4/h^3c

You can calculate yourself by equating emerry from the formula E=-ke (ze)/2r,and then substituting it with r and v with mvr=nh/2pi.

Then E2-E1,then solve. Thank you