An electron makes a transition from orbit $n = 4$ to the orbit $n = 2$ of tha hydrogen atom. The wave number of the emitted radiations ($R =$ Rydberg's constant) will be
$\frac{16}{3R}$
$\frac{2R}{16}$
$\frac{3R}{16}$
$\frac{4R}{16}$
Orbital acceleration of electron is
Based on which experiment did the Rutherford nuclear model come from?
Discuss the experimental results of Geiger-Marsden's $\alpha $ -particle scattering.
What is impact parameter ?
In Bohr model of hydrogen atom, the force on the electron depends on the principle quantum number as