Friday, August 17, 2018

visible light - Do all the photons have the same energy?



The title is pretty self-explanatory. Do all the photons have the same energy?




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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 \...