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Problem 33.8: Hidden mirrors, point source

Object A: Restart

Object B: Restart

Object C:  Restart

Object D:  Restart

Please wait for the animation to completely load.

Four regions are hidden by a curtain. You can drag the source of light to any location and adjust the beam width (position is given in meters and angle is given in degrees).

  1. What is behind each curtain?
  2. Rank the objects in terms of their focal lengths, from smallest to greatest.

Problem authored by Melissa Dancy.

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