The problem statement
Find the lightpath with a given starting and ending points via one or more mirrors.
In those kind of problems you try image someone pointing a laser with a very narrow beam at a certain direction to the mirror, so it will reach point
You are seeing a square mirror room (with mirrored walls
d) where you point from point
A via the mirrors
a to point
B. A sketch can be made easily made:
In order to find a more accurate solution, we flip the base cell with the points
B a few times as shown in the image. After the mirroring is done, the line connecting
A is drawn towards the mirror image
Question: Construct the path in the original square. Complete the drawing.
Why do I need to do with those virtual squares? I don't see an logical way to draw the reflections easily. And why is the line drawn from
B' through all those other virtual rooms?