Wednesday, September 18, 2019

electromagnetic radiation - Are wave fronts in double-slit experiments moving forward?



I ask a question about "What is a wavefront?" which follows the question "What makes the radiation behind a slit coherent".


For the wavefront it was answered, that "In electromagnetics ...(that are) the points that are at the same height." Now I'm wondering, are the wavefronts moving?




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classical mechanics - Moment of a force about a given axis (Torque) - Scalar or vectorial?

I am studying Statics and saw that: The moment of a force about a given axis (or Torque) is defined by the equation: $M_X = (\vec r \times \...