Hello candidate,

The Orbital period as per Bohr's Postulates is given as T = 2πrn / v, where r is radius of nth orbit, v is the velocity of electron is nth orbit.

The expression for the orbital period of the electron is proof from the expression of- angular momentum of an electron moving in an atom As given by Bohr's postulate is given by mvr equals to nh/2π.

Hope it helps you. Have a good day!!