Saturday, April 21, 2018

homework and exercises - Apparent depth is supposed to be independent of viewing angle but this seems inconsistent with critical angle refraction


When rays from the object at some depth are draw so as to be incident at the critical angle (or some angle just lower) the ray is refracted along the surface. Retracing this line would give you an image directly above but on the surface of water. How then can one state that apparent depth doesn't depend on viewing angle?




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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 \...