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• Reflection
  2 mirrors are inclined at an angle θ as shown in figure.Light ray is incident parallel to one mirror.The ray will start retracing its path after the third collision if: a)θ=45° b)θ=30° c)θ=60° d)all three *Image* ...
  0·7· #Physics#Optics
  replied2016-08-18 19:42:18