# Category Archives: Quantum Physics

## Photon and its properties

In this article, we will discuss about the photon and its properties: A photon is basically a basic particle which carries with itself electromagnetic energy. The light coming from sun has different wavelengths or energy and on the basis of … Continue reading

## Application of Schrodinger wave equation: Particle in a box

Consider one dimensional closed box of width L. A particle of mass ‘m’ is moving in a one-dimensional region along X-axis specified by the limits x=0 and x=L as shown in fig. The potential energy of particle inside the box … Continue reading

## Wave function and its physical significance

WAVE FUNCTION If there is a wave associated with a particle, then there must be a function to represent it. This function is called wave function. Wave function is defined as that quantity whose variations make up matter waves. It … Continue reading

## Time Independent Schrodinger Wave Equation

As discussed in the article of time dependent Schrodinger wave equation: V=A exp[-i/Ћ(Et-px] = A exp(-i/Ћ Et) exp(i/Ћ) Ψ=ψ’ exp(-iEt/Ћ)                                                             (1) Where Ћ = h/2π So, ψ is a product of a time dependent function exp(-i/Ћ Et) and a position … Continue reading

## TIME DEPENDENT SCHRODINGER WAVE EQUATION

In quantum mechanics, the wave function ψ corresponds to the variable y of wave motion. We know that the wave function for a particle is given by Ψ(x,t)=A exp[-i(ωt-kx)] Put ω=2πv and K=2π/h Ψ(x,t)=A exp[ -i(2πvt-2π/h x)]                                      (1) If E= … Continue reading

## Origin of Quantum Physics

Broadly, there are two types of mechanics called classical mechanics and quantum mechanics. Classical mechanics or physics explained successfully motion of the objects which can either be observed directly or can be made observable by instruments like microscope. But, the … Continue reading

## Applications of the Heisenberg Uncertainty Principle: The Radius of Bohr’s First Orbit

In one of my earlier articles, I have discussed the one the applications of the Heisenberg uncertainty principle that is non-existence of electron in the nucleus. Let us discuss today the one more application of the Heisenberg uncertainty principle that … Continue reading

## de Broglie concept of matter waves: dual nature of matter

MATTER WAVES : dE-BROGLIE CONCEPT In 1924, Lewis de-Broglie proposed that matter has dual characteristic just like radiation. His concept about the dual nature of matter was based on the following observations:- (a)    The whole universe is composed of matter … Continue reading

## Applications of Heisenberg’s Uncertainty principle: Non-existence of electrons in the nucleus

Applications of Heisenberg Uncertainty principle The Heisenberg uncertainty principle based on quantum physics explains a number of facts which could not be explained by classical physics. One of the applications is to prove that electron can not exist inside the … Continue reading

## Heisenberg uncertainty principle

Statement: According to Heisenberg uncertainty principle, it is impossible to measure the exact position and momentum of a particle simultaneously within the wave packet. We know, group velocity of the wave packet is given by vg =∆ω/∆k Where ω is … Continue reading