DeeVas

           Earth is rotating on its axis about  1673 km/h.          Why do earth spin? is an age old question. Not only earth , everything in the universe spin .          And the common answer for such questions is inertia – the ability to resist change in motion.          But now, let's think deep into it.         To answer this we have to go to the beginning, about 4.5billion years ago.          In our old blog Nebula, we saw how the stars are formed.          4.5 billion years ago our solar system was formed from a nebula .           In that nebula as usual when hydrogen and helium atoms contracted and expanded, the nebula stated to rotate with an angular momentum. As the process goes on also, the direction of spin didn’t change.          After somet...

Physics is divided in to four major domain with respect to size and speed.          Particle size more than a nanometer and in less speed compared to speed of light – classical mechanics.          Particle size less than a nanometer (near to size of atom) and in less speed compared to speed of light – quantum mechanics.          Particle size more than a nanometer and in speed comparable to speed of light – relativistic mechanics.          Particle size less than a nanometer (near to size of atom) and in speed comparable to speed of light – quantum field theory. Any type of study under physics will come under this four categories. With respect to energy:          Milli electron volt to few electron volts   -   solid state physics          Kilo electron volt to million electron volt   - nuclear physics   ...

 What is plasma?  The 4th state of matter We know the basic 3 states of matter; solid, liquid and gas. Lets consider solid, if we give more energy to solid (example by heating) it became liquid. If we give more energy to liquid it become gas, example water. But what will happen if we heat the gas? In gaseous state molecules and element are not in ionized form. When we heat the gas, above certain temperature the electrons get removed from the atom, we will get ionized gaseous state which is plasma. Plasma is  a gas of ions – atoms or molecules which have one or more orbital electrons stripped (or, rarely, an extra electron attached), and free electrons. Plasma makes 99% of visible universe. In 1879 Sir William Crookes first discovered plasma in laboratory. Irving Langmuir coined the term plasma, because it looked like blood plasma. Plasma is very energetic and emit light. Plasma can be created artificially by knocking of electrons from atoms which can be done by heating ...

"Glass is the most magical of  all the materials, it transmits light in a special way" -Dale Chihuly From the ancient times to now, glass materials have been used in many ways and it's still a piece of attraction in the construction of buildings. But what is the composition of glass and what property makes the glass transmit the light in different ways and in different colors? Let's peep into it! History of glass: The history of glass is originated from Mesopotamian civilizations , which is still a mystery since some claim that they would have adopted the glass making from Egypt and it was estimated to be in existence from 3600 BC.  The first glass factory was established in 1608 which was built in Jamestown, Virginia, United States. However, the art of glass making and it's production was then embraced by other countries. What is a glass? Glass is a mixture of silicates with sodium carbonate and lime. It is an inorganic solid material , which is made from liqui...

 "Life is like a rainbow. You need both the Sun and the Rain to make it's colors appear!"   A s this quote depicts that a rainbow is the result of reflection of sun's light by the water droplets, the color of an object is seen by the wavelength of light that falls on it. Visible light is an electromagnetic radiation between the wavelength range of 400nm to 700nm. The human brain can distinguish up to 100 millions of colors depending upon the combination of wavelengths of visible light reaching our eyes. Longer wavelength region (700nm) have R ed color and as the wavelength reduces it changes to O range, Y ellow, G reen, B lue-green, B lue, I ndigo and V iolet (400nm). The major source of visible light for the Earth is Sun. We receive white light (combination of VIBGYOR) from Sun. What actually happens? When light falls on an object, not all the light gets reflected. Some frequency range of light is absorbed by the object. Only the reflected frequency of light are...