The Bohr model of atoms

Options

A. assume that the angular momentum of electrons is quantized
B. uses Einstein's photoelectirc equation
C. predicts continuous emission spectra for atoms
D. perdicts the same emission spectra for all types of atoms

Answer

A

Explanation

According to Bohr's hypothesis, electron can revolve only in those orbits in which its angular momentum is an interal muliple of `(h)/(2pi')` where `h` being the Planck's constant. In these orbits, angular momentum of electron can have magnitude as `(h)/(2pi'), (2h)/(2pi'), (3h)/(2pi)..` etc, but never as `(1.5h)/(2pi'), (2.5h)/(2pi'), (3.5h)/(2pi)`, ......etc.
This is called the quantisation of angular momentum.