DeeVas

  Sometimes it's the detours which turn out to be the fruitful ideas  - Roger Penrose 1.  Sir C.V. Raman (1888-1970)   Alma matter : Presidency college, University of Madras. Research field : Optics and acoustics Awards received: Nobel Prize, Bharat Ratna, Lenin Peace Prize, Fellow of Royal Society. He is known for his prominent work in scattering which led to the discovery of Raman effect. 2.  Satyendranath Bose (1894-1974) Alma matter : Presidency college, Calcutta. Research field : Quantum Mechanics Awards received: Padma Vibhushan, Fellow of Royal Society He is known for the invention of boson and Bose-Einstein condensate. 3.  Meghnad Saha (1893-1956) Alma matter : Presidency college, Calcutta and Rajabazar Science College. Research field : Quantum and Statistical Mechanics, astrophysics. Awards received: Fellow of Royal Society He is known for developing Saha ionization equation. 4.  Homi J. Bhabha (1909-1966) Alma matter : University of Cambridge...

   eV is abbreviated as “electron-Volt”. Electron Volt is a simplified unit of energy. We know that joule ‘J’ is the S.I unit of energy. But why do we use eV then? Let’s see. The basic definition of an electron volt is, ‘It is the energy that an electron gains when it travels through a potential of one volt'. The energy associated with an electron is measured in small unit called eV. For an understanding, let us consider a parallel plate capacitor with positive charged plate on the left   side and the negative charged plate on the right side connected by a battery of 1V potential difference. Consider an electron on the side of a negatively charged plate which is attracted to the positive charged plate due to electrostatic force.  Therefore a kinetic energy is created when the electron moves from plate A to B. This kinetic energy is measured as one electron volt. 1eV means 1.6 x 10^-19 coulomb x 1 volt or just 1.6 X 10^-19 Joule. Though we have the S.I unit of energy ...

         As we already saw in our blog ‘How do we see colors’, “It’s the material, Not the color! – how do we see color?”, black body is an ideal object.          Black body is an object that can absorbs all frequencies of radiation.          Due to this the object get heated up and when its temperature equals to the surrounding temperature, the object starts to radiate energy in the form of electromagnetic radiation .         Depending upon the temperature of the body the intensity of the radiation of different frequency varies.          Almost all the object behave like an black body (but not like an ideal one), example: sun, human body, hot objects …          In 18 th century when scientist thought that they found almost everything in the field of physics, black body concept came as a challenge in front of them.        ...