# Quantum Mechanics

## Strange Ramanujan Summation 1 + 2 + 3 + 4 +… … … = -1/12

Strange Ramanujan Summation  1 + 2 + 3 + 4 +….. =  -1/12  #Ramanujan #SrinivasaRamanujan #RamanujanSummation #GrandiSeries In this video lecture we will discuss the proof of Ramanujan summation of natural numbers  1+2+3+4…..=-1/12. Ramanujan wrote a letter to Cambridge mathematician G.H Hardy and in the 11 page letter there were a number of interesting results …

## Lecture 4-LASER Basic concept Properties

Lecture 4-LASER Basic concept Properties Lasers are special and different from other light sources due to coherence. Laser beams can be focused to very tiny spots. That’s why the laser gun is important. They can have very low divergence in order to concentrate their power at a great distance. Laser means light amplification by stimulated …

## Evolution of Quantum Physics The nature of light (radiation)

Evolution of Quantum Physics The nature of light (radiation)                                 Evolution of Quantum Physics The nature of light (radiation) has been a matter of long debate and a great confusion in the history of Physics. Rene Descartes, the father of the Cartesian geometry, first gave the corpuscular (particle) nature of light and the great Newton …

## Dual nature of radiation and matter

In 1887, Hertz conducted an experiment. It was showing that when a light beam falls on a metal surface, there was some kind of electrical reaction. But he did not attempt to explain it. Can you guess, the cause behind this effect? Particle in a Box

## Particle in a Box

Particle in a Box We are going to discuss a single particle in a box classical as well as quantum. Classically: Particle confined in a box and walls of the box are completely rigid. So it can not penetrate the walls of the box. Particle have momenta p so it has kinetic energy E and it …

## Quantization of Gravity

Quantization of Gravity When we are talking about quantization of gravity,one question strikes in our mind is that What is the motivation to quantize the gravity and what are the problems physicists are facing to quantize gravity? What are the attempts to quantize gravity and how much are they successful? Theory of gravity is the …