User talk:Razaalitalpur

Photon The packets of light are called photon

Calculator
Why does a calculator start writing digits in right side? but We write counting in the left side. Razaalitalpur (talk) 05:26, 18 May 2016 (UTC)

Energy
Energy is a capcity of doing work. Energy is associated with the performance of work. Work is always done by force. It means body possessing an energy can exert force on any other body to do work. Razaalitalpur (talk) 05:38, 18 May 2016 (UTC)