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This article is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.PhysicsWikipedia:WikiProject PhysicsTemplate:WikiProject Physicsphysics articles
The red trajectory shown in the figure is right but not complete to easily understand the "right" to "left" turnaround. For this we take a point not in the center of the object "F" and we'll see in the bottom the two reflections of the path so that the image is returned "left" to "right".