According to classical theory, the circular path of an electron in Rutherford atom is
Spiral
Circular
Parabolic
Straight line
What is head-on collision ? For that tell the impact parameter.
An electron having de-Broglie wavelength $\lambda$ is incident on a target in a X-ray tube. Cut-off wavelength of emitted $X$-ray is :
In gold foil experiment number of deflected $\alpha -$ particles at angle $90^o$ is $63$ than number of $\alpha -$ particle deflected at $120^o$ is
In the result of the Geiger-Marsden experiment, by which the trajectory of the $\alpha $ -particle can be calculated ?
An electron is moving round the nucleus of a hydrogen atom in a circular orbit of radius $r$. The Coulomb force $\vec{F}$ between the two is