State Bohr's postulate to explain stable orbits in a hydrogen atom. Prove that the speed with which the electron revolves in `n^(th)` orbit is proportional to (1/n).

Magnetic moment of an electron in n^("th") Bohr orbit is proportional to

In Bohr's model of hydrogen atom, the period of revolution of the electron in any orbit is proportional to

(a) State Bohr's postulate to define stable orbits in hydrogen atom. How does de Broglie's hypothesis explain the stability of these orbits ? (b) A hydrogen atom initially in the ground state absorbs a photon which excites it to then n = 4 level . Estimate the frequeny of the photon.

The linear speed of an electron in Bohr's orbit is inversely proportional to

The linear speed of an electron in Bohr's orbit is inversely proportional to

The angular speed of the electron in the n^(th) Bohr orbit of the hydrogen atom is proportional to