Question

Identify the expression for Bohr’s second postulate.

(a) L = \(\frac {nh}{2p}\)

(b) L = \(\frac {2p}{nh}\)

(c) L = nh*2p

(d) L = \(\frac {n}{2p}\)

This question was posed to me in an online interview.

Question is from DE Broglie’s Explanation of Bohr’s Second Postulate of Quantisation topic in chapter Atoms of Physics – Class 12

Answer 1

Correct option is (a) L = \(\frac {nh}{2p}\)

To elaborate: According to Bohr’s second postulate, an electron revolves around the nucleus of an atom in orbits and, therefore, the angular momentum of the revolution is an integral multiple of \(\frac {h}{2p}\), where h is the Planck’s constant. Thus, the expression for angular momentum is given as:

L = \(\frac {nh}{2p}\)