. The gravitational force between an H-atom and another particle of mass m will be given by Newton’s law: F = G M.m/r2 , where r is in km and
(a) M = m proton + m electron
(b) M = m proton + m electron - (|V |/c2) (where, |V| = magnitude of the potential energy of electron in the H-atom)
(c) M is not related to the mass of the hydrogen atom
(d) M = m proton + m electron – (B/c2) (where, B = 13.6 eV)
Answer: The answer is the option (d) M = m proton + m electron – B/c2 (where, B = 13.6 eV)