How will you express, the energy of the electron in the `n^(th)` orbit , in terms of the Rydberg constant, planck's constant and the velocity of light ?

Options

A. `E_n=-n^2 Rch`
B. `E_n = - (n^2)/(Rch)`
C. `E_n=-(Rch)/(n^2)`
D. `E_n = - (ch)/(Rn^2)`

Answer

C

Explanation

`E_n = - (me^4)/(8epsi_0^2h^2n^2) " and " R= (me^4)/(8epsi_0^2ch^3)`
`therefore E_n/R = - (ch)/(n^2) " or " E_n = - (Rch)/(n^2)`