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Problem

If a light beam is fired through the top left corner of a 2 by 3 rectangular prism block at a 45 degrees towards the opposite wall, it will emerge from the top right corner.

If the light bounces around a 2 by 4 rectangle, it emerges from corner D.

If a beam of light is fired through the top left corner of a 2 by 50 rectangle, which corner will it emerge from?