M Dash Foundation: C Cube Learning

Tag: photon

  • A Photon has no mass. It can’t rest.

    A Photon has no mass. It can’t rest.

    A) A Photon has no mass. B) A implies “It can’t rest”. C) Therefore it doesn’t have rest mass. D) Photon rest mass is zero. Assertion and reasoning; A is correct. B is correct and follows from A. C is correct, it does follow from B. But D is incorrect it does not follow from…

  • What happens when squirrels do not move.

    What happens when squirrels do not move.

    Stationary state and squirrels ! Okay so the squirrel isn’t moving around so much, giving a fuzzy image. We can call the instant during which the squirrel wasn’t moving akin to a “gross” stationary state. But why is the railing of window fuzzy? It isn’t moving ! Diffraction. Due to diffraction enough light is coming…

  • Uncertainty Principle and Photography !

    why a moving object becomes fuzzy when you take its picture. Speed bears an uncertainty with momentum (hence energy ) just like time with energy and position with momentum. But for photons which are always ultra-relativistic we should not talk about its positions. Due to speed (relative motion of objects such as your and moving…

  • A particle that defies classical mechanics !

    A photon has no mass but energy and it has speed and it has momentum although it does not have mass. Thats impossible in Classical Mechanics. Because Classical Mechanics associates with every mass; momentum and kinetic and potential energy. All those would be zero if mass were to be zero. Also the speed of the…

  • The photon saga.

    5. Photon is a zero mass particle (not a zero rest mass particle) and its deflection in gravitational field, called gravitational lensing is due to two reasons; i. single photon effective mass is due to the definite energy and momentum of the same. ii. multiple photons have non-zero invariant mass, hence they behave like any…