Ravindra Jadhav

Physicists Science and technology are partners - the joint venture between which has brought the world to where it is now. The industrial revolution in the 18th century led to economic growth and scientific discoveries and inventions. Physics and Physician both words have similar meanings - related to natural science. If it is about understanding nature - it is physics and if it is about understanding the medical condition of a human being - he is a physician. Physicists have been exploring regions beyond visible light for 200 years. The curiosity of Sir William Herschel realized the existence of Infrared light. Ritter pursued the purple end and discovered ultraviolet light. James Clerk Maxwell in 1967 proposed long wavelengths. The discovery of x-rays and gamma rays brought us closer to the reality that all lights are a part of a big picture called the electromagnetic spectrum. As shown in the image below the wavelengths range from a millionth of millimeter to thousand meters to make ...

 Graphene – Graphene, Where have you been? I have been in Graphite. Two persons helped me to come out of it and brought me into this world. For that, they have been given some prize called Nobel. So, what did you there and what exactly are you? I have been used as pencil. The wikipedia says, I am carbon's brother but only one atom thick planar sheet. If carbon atoms are placed on paper in honeycomb shape, that becomes me. You of course can't see me with your eye. But If you see me through powerful microscope, you can identify my hexagonal design. A human hair would look so big in that microscope that probably you won't be able to see it. (taken from istockphoto.com) I need least energy to maintain my structure. That increases my usability. My extremely small thickness would allow ultra small devices which will further miniaturize electronics. This also increases my usability. In fact, you shall see in near future, how things changes, due to my involvement. An UC Berkele...

  “ The successful warrior is the average man, with laser-like focus.” – Bruce Lee My papa showed me ‘saptarshi’ and Pole star when I was in school. I was interested in Astronomy. In fact everyone is at least gets charmed at least once by the celestial show that begins each night. This ignites curiosity in our mind about what these bright spots are, how they change, how distant are they, is there a heaven? The interest brought me to an amatuer astronomy meet at Madhavpur ghed (famous for its krishna temple, Osho ashram and a beautiful beach) in 2008. While sky gazing, I was shocked and amazed when Mr. Narendra Gor, the main organizer of the meet, indicated some of the stars using something in his hand. The light was coming out of it and seemed to reach to the stars. In an instant my interest shifted from astronomy to that thing in his hand. In the question answer sesion that followed, I asked him about the thing in his hand? He smiled and said it was 635 nm 5 mW red laser pointer. ...