How the Einstein photoelectric equation was tested?
admin 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…
Prove that Light has a dual nature?
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…
Explain the Bohr Theory of hydrogen atom
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…
Explain the spectrum of Hydrogen
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…
Explain in detail how Sommerfeld extended the Bohr Theory
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…
What were the objections to the Bohr model of atom?
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…
Explain the dual nature of electron?
In 1905, it was Einstein who suggested the concept of light having a dual nature; particle and wave nature. In a similar way, Louise de Broglie suggested that electron also…
What is the difference between matter and electromagnetic waves?
Electromagnetic waves are very much different from the matter waves and in many ways. a) Speed of matter waves is very much less than the speed of electromagnetic waves. b)…
Derive the Bohr angular momentum from de Broglie’s relation
Let us consider an electron revolving around a nucleus of an atom. The wave train formed by it is as shown in figure. Now, for the wave to be in…
Define third law of thermodynamics. Discuss the importance of third law of thermodynamics.
The third law of thermodynamics states that: “The entropy of all the perfect crystalline solids is zeros at absolute zero temperature”. The third law of thermodynamics is also referred to…