eli5: Why does a magnifying glass flip the image after a certain distance from the eye?
In: Physics
Just like two people will end up on opposite sides of each other after their paths cross, the two ends of a light beam do the same thing. After all, a lens takes a certain image and changes the paths of the photons. At a certain distance, they will come together and form a sharp image for your eyes (or for burning stuff if you’re that kid) at the “focal point.” But farther away than that, the light beam will have crossed paths with itself and become upside down/backwards.
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