Wednesday, March 21, 2018

electromagnetic radiation - Does slowing light violate relativity?


Last year Scottish scientists managed to slow down photons in vacuum by changing their shape. Does this violate the special theory of relativity?





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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 \...