Write the expression for energy of an electron orbit of hydrogen atom.

Explanation

`E_n=(-me^4)/(8epsilon_0^2n^2h^2)`
Where,
m - mass of an electron
e-quantised unit of charge
`epsilon_0` - absolute electrical permittivity of free space.
n- principal quantum number
h - planck.s constant
`E_h` - energy of `n^(th)` orbit electron