As a mirror is a flat plane, shouldnt we be able to
see everything reflected in that plane in focus?
In: 0
It is a flat plane, but light has a travel time. Meaning the reflected image still has depth. But interestingly, it’s the opposite of how it is normally. For example, to focus on your reflection, you have to focus the distance to the mirror from your face, doubled. You’re essentially focusing *through* the mirror.
I’m gonna try and explain it. Lenses work by taking a parallel beam of light and collapsing it to a single point, which is the focal point. But for reasons I’m not qualified to explain, the distance a light has to travel affects how much it needs to be corrected. So a light that goes straight from a surface to your eye is bent differently than a light that hit a mirror first. Why it doubles the distance and doesn’t just add the distance to your eye, again idk.
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