The binding energy of a H-atom considering an electron moving around a fixed nuclei (proton), is
`B = - (me^(4))/(8n^(2)epsi_(0)^(2)h^(2))` (m= electron mass)
If one decides to work in a frame of refrence where the electron is at rest, the proton would be movig around it. By similar arguments, the binding energy would be :
`B = - (me^(4))/(8n^(2)epsi_(0)^(2)h^(2))` (M = proton mass)
This last expression is not correct, because

Options

A. n would not be integral
B. Bohr-quantisation applies only to electron
C. The frame in which the electron is at rest is not inertial
D. The motion of the proton would not be in circular orbits, even approximately

Answer

C

Explanation

When one decides to work in a frame of reference where electron is at rest, the given expression is not true as it forms the noninertial frame of reference.