KNOW PHYSICS

Light in Seventeenth century In seventeenth century, there were very less facilities for experiments. But the nature was nature, as it is now. Many major behaviors of light was known at that time- Light cast shadows . Which shows that light travels in straight line. Light is reflected from smooth surfaces. The rules of reflection are- (i) The incident ray, the reflected ray and the normal are in the same plane (ii) The angle of incidence is equal to the angle of reflection. When light is travelling from one medium to another medium, it bends unless it falls on the second medium normally. The rules of this phenomenon, called refraction , are: (i) The incident ray, the refracted ray and the normal are in the same plane  Light comes in different colours such as red, yellow, green, blue, violet, etc. All the scientist were trying to understand that why light shows these characteristic behaviors of straight line motion, reflection, refraction, colours, etc Newton's corpuscle theory

The man who invented the 20th century is none other than Nikola Tesla. He is serbian-american inventor, electrical engineer, mechanical engineer and a futurist. Best known for Alternating current(AC) and electrical supply system. Nikola tesla  Born - 10 July, 1856. Died -  7 January, 1943 (83 years). Beginning with a quote of Nikola Tesla- " The scientists of today think deeply instead of clearly. One must be sane to think clearly, but one can think deeply and be quite insane. " Eidetic Memory  Tesla read many works. He can memorize complete books. He supposedly possessed a photographic memory. He was a polyglot, speaking eight languages: Serbo-Croatian, Czech, English, French, German, Hungarian, Italian, and Latin. Tesla related in his autobiography that he experienced detailed moments of inspiration. He often see blinding flashes of light before his eyes, also accompanied by visions. Many times the visions were related to the word or the idea that he was currently wor

MAGNETIC FIELD Today we are going to talk about magnetic fields .   (Suggest more topics in the comment section) The fundamental problem electrodynamics hopes to solve is this(figure): We have some electric charges, q1,q2,q3,...........(call them source charges); what force do they exert on another charge, Q (call it test charge)? The position of the source charges are given (as functions of time); the trajectory of the test particle is to be calculated. Source charge and test charge According to the principle of superposition , it is sufficient to find the force of a single source  charge- the total is then the vector sum of all the individual forces. In the simplest case, electrostatics, the source charge is at rest(though the test charge need not be). We will consider the forces between charges in motion. To give you some sense of what is in store, imagine that I set up the following demonstration:  Two wires hang from the ceiling, a few centimetres apart; when I turn on a current,

Let us first understand what gravity is. Gavity also known as gravitation, is a phenomenon (not a force) of attraction of all the things that have mass-energy like planets, galaxies and light towards one another. What happens: when an object is freely Falling? Don't get confuse between gravity and Gravitational Force. They are separate terms. Gravity is a natural phenomenon. Whereas, Gravitational force is a force that is a measure of attraction. Gravity is the phenomena or cause of, why we are able to stand. Whereas gravitational force is responsible for our weight. If you go to moon then your weight becomes 1/6th of  the weight on earth. Gravity is the reason, why planets revolve around sun., and moons revolve around planets. It is the phenomena, which plays an important role in galaxy formation. Most of the galaxies have a black hole as their centre. Black hole have very large gravitational effect. Now from Newton's laws of motion , we know that ac

Many of you have an image of Sir Isaac Newton. You probably think Issac Newton as a person who contributed immensely in Physics through his laws of motion, gravitation which were the foundation of classical mechanics which we study today. Was Isaac Newton an alchemist? Or many of you think Isaac Newton as a mathematician who invented calculus(debatable). Or the person who proved the society wrong by proving that the light is made up of different colours, with his research on optics. But there is also an other side of his personality. He was heavily interested in alchemy and other occult practices. The world came to know this side of him by the unpublished papers written by him on these topics. Sir Isaac Newton was heavily involved in Alchemy . It is considered as an occult science. Alchemy is the medieval forerunner of chemistry, concerned with the transmutation of matter, in particular with attempts to convert base metals into gold or find a universal elixir. S

Dark Matter in a nutshell  Introduction  The matter in which the modern scientists are higly interested in is the Dark Matter. So, what is Dark Matter? How it was formed? Who suggested the idea of Dark matter? How much amount of it is in the universe? Does it interact with other particles? What is Baryonic Matter? Can we detect dark matter or has anyone detected it till now? Let find out. Also subscribe the blog for email notifications. What is Dark Matter? Dark matter is a type of matter. Dark matter is called Dark because it does not appear to interact with electromagnetic field, which means it doesn't absorbs, reflect or emit electromagnetic radiations, and is therefore difficult to detect. Primary Evidences The primary evidence comes from the calculations done after studying about different galaxies in the universe.It was observed that may of the galaxies would fly apart, not move as they move or even do not form until and unless they contain a large

BROWNIAN MOTION Introduction One of the most asked question is- what is Brownian Motion? Brownian motion was first observed in 1827 by Brown, a botanist. The phenomenon of Brownian movement can be easily observed in a laboratory if a colloidal solution is examined under and ultramicroscope. As the direction of illumination is perpendicular to the axis of the microscope, the suspended particles in the solution look like bright illuminated spots.  Is eliminated particles continuously move to and fro in a random haphazard way. The particles spin, rise, sink and rise again. The movement of the particles is continuous and spontaneous. This non-stop random and haphazard motion is perpetual and spontaneous.                  Click here for-  Our FACEBOOK PAGE So, what is Brownian Motion? This non-stop, random and haphazard motion is called Brownian Motion. According to Albert Einstein's theory of transitional Brownian Motion, the particles tend to diffuse into the