The ratio of the velocity of the electron in the first orbit to that in the second orbit is

The ratio of the angular momentum of the orbital electron in the first orbit to that in the 2nd orbital is

(a)Show that the ratio of velocity of an electron in the first Bohr orbit to the speed of light c is a dimensionless number. (b) Compute the velocity of electrons in ground state, first excited state and second excited state in Bohr atom model.

Prove that, velocity of an electron in the first orbit in twice of that revolving in the second orbit of H-atom.

The change in velocity when electron jumps from the first orbit to the second orbit is

The change in velocity when electron jumps from the first orbit to the second orbit is