Saturday, June 1, 2019

particle physics - Can the spin of a photon change during its "life"?


Or is the spin set in one of two possible states at its moment of creation and does not change for the rest of the duration of its "life"?




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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 \...