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Many physical phenomena are associated with unbelievably small time scales. Let me give a few examples.The time scale associated with visible light is $sim$ a femtosecond ($10^{-15}$ sec),The...
Asked on 11/26/2020
1 answerThe Question For a system with translational invariance, one can expand a position-space bosonic operator in a basis of momentum-space operators. For 1D this looks like $$hat{a}_x(t) = sum_k...
Asked on 11/26/2020
0 answerThis is freshly ground pepper on water. Why is there a triangular configuration of the water around the pepper fragment? Surely all these pepper fragments have different shapes? You can...
Asked on 11/26/2020 by graveolensa
1 answerI recently read about Cherenkov Radiation and the neat blue glow it creates in underwater nuclear reactors, and my understanding of it is that it occurs due to particles (...
Asked on 11/26/2020 by Extr3mis
1 answerIf I were to take a photograph of a bullet in mid-air I wouldn't be able to tell which way the bullet is moving. However, the bullet has the property...
Asked on 11/26/2020
5 answerI m really confused between virtual and real images. While doing a convex lens experiment using optical bench (I have attached an image), when I look through the lens I...
Asked on 11/26/2020 by user203191
3 answerAlright, so I'm trying to understand in detail what occurs the moment the water covers the outlet tube in a bell siphon. Most sources hand wave and just say "SIPHON...
Asked on 11/26/2020 by Ductile_Iron
2 answerI always see the form of the field operators derived by, in the case of a scalar spin 0 particle, imposing the field commutation relations on the classical field solutions...
Asked on 11/26/2020
1 answerLet's consider a discrete quantum system such as the harmonic oscillator or the hydrogen atom. According to quantum mechanics, when a measurement of the energy of the system is made...
Asked on 11/26/2020 by Rhino
1 answerCan some one explain the diffrence between steady state intensity and saturation intensity in lasers. And diffrence between gain at threshold and gain at steady state,why are these two gain...
Asked on 11/26/2020 by adel
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