What is a black body? A body which absorbs all the radiations falling at its surface is called a black body. A black body is also a perfect emitter .i.e.…
The distribution of energy in the spectrum of radiations of a hot body cannot be explained by applying the classical concepts of physics. Max Planck gave an explanation to this…
This is an effect observed by Sir J.J Thompson while performing some of his famous experiments. He observed that electrons are ejected by a metal surface when light of a…
The Quantum Theory of Radiations by Max Planck can explain the photoelectric effect very well. Max Planck says that light is made of bundles of energy known as photons, energy…
It was Robert Millikan who tested the Einstein photoelectric equation. He first calculated the kinetic energy gained by the emitted electrons for a number of frequencies by applying an opposing…
Well it is very much evident that photoelectric effect can only be explained if particle nature of light is considered. But there are some phenomenons like diffraction, polarization of light…
There was one major objection to the Rutherford model of atom and Bohr was the one to point it out. So while giving his Theory of hydrogen atom, he took…
According to Bohr, when an electron from its initial stationary orbit with n= ni jumps to another (lower) stationary orbit with n=nf, it emits energy equal to the difference between…
Bohr was able to calculate the radii as well energies of the stationary orbit around the nucleus in an atom and those calculated values were found to be in a…
Though the Bohr and sommerfeld were able to explain the atomic spectra of hydrogen and like species but still there were many anomalies to their theory. Both Bohr’s theory and…
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