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Quantum Mechanics #3- Classical Mechanics failed to explain Black Body Radiation, led Planck to the discovery

Quantum Mechanics #3 Black Body A perfectly black body is one which absorbs totally all the radiation of any wavelength which fall on it. As it neither reflects nor transmits any radiation, it appears black; whatever be the colour of incident radiation. The main characteristic of such a body is that when heated to a suitable high temperature, it emits full or total radiation. As it is a perfect absorber, it is also a perfect radiator, its emission being the greatest possible for every wavelength at any given temperature. BLACK BODY Black Body in Practice  In practice, a perfectly black body is not available. Lamp-black and Platinum black are the nearest approach to a black body. However, a body showing close approximation to a perfectly black body can be constructed. Black Body absorber                   Black body emitter A closed chamber, say a hollow sphere (known as hollow spherical cavity) whose in...
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Isaac Newton was an alchemist ? Was Isaac Newton searching for The Philosophers Stone ?

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 The world came to know this side of him by the unpublished papers written by him on these topics.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...
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Production , Properties and Uses Of X-Rays

X-Rays  Introduction X rays discovered by William Roentgen in 1895 honoured by Nobel Prize in 1901. Basically are high energy photons (1- 100Kev) or electro-magnetic radiation, having a very short wavelength of the order of 1A⁰. Typical x-ray wavelength lies between the range of  1 A⁰ and 100A⁰. Accordingly they are classified into hard X-rays and soft X-rays.  Uses of X rays are multifold. Usually they are used in surgery, radiotherapy, engineering, industry, detective department, scientific research and so many other areas. Hence, the name X-rays is popularly known even to a common man. Production Of X-RAYS The modern X-ray tube was designed by Dr.Coolidge and is known after his name as coolidge tube. It is widely used for commercial and medical purposes. Construction and working of Coolidge Tube The construction of coolidge tube to produce X-rays is schematically shown below. The cathode C consists of a tungsten filament  heated by p...
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