• # question_answer State Bohr's postulate of quantisation of angular momentum of the orbiting an electron in hydrogen atom.

According to Bohr's postulate, only those orbits are permissible for the revolution of an electron around the nucleus in which the angular momentum of an electron is an integral multiple of $h/2\pi .$                         $L=mvr=\frac{nh}{2\pi };n=1,\,2,\,3,...$ Here, n is the principal quantum number.