Physicsknowledge@santoshchaudhary: Santosh Chaudhary is Post Graduate in physics from Nalanda Open University. He is the author of the two books "Ancient Mithila University" and "Shaunaka Mahashala" published by the Notion Press Publication. He has written an article titled “First Fundamental Law of Physics” which is available online. It is available at Wikiversity website. He has written 52 articles on famous encyclopedic website Wikipedia on different topics. He has written some teaching document of Quantum Mechanics known as "A Journey to Quantum Mechanics".