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It is more complicated than this, but... I don't think it has as much to do with the refractive index of water but rather the shape of our corneas and the loss of this shape advantage under water, for if the eyes are protected by goggles, one can see quite clearly underwater (much the same as a camera can, as the shape of it's lenses are not affected). Any ...


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Degraded eyesight can mean two basic processes: 1) Degradation of the imaging optics in your eye that focus light onto the retina such that light is not focused correctly, or 2) Damage to the retina itself so that light is focused, but signals to your brain are not generated in response to light. What these two processes have in common is that they are ...


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It's been too long since physics to have a good answer, but I know that if you look at an object in a flat mirror, the light coming off the mirror would be identical to light coming a real object in the same position. The angles of the light rays are the same. Therefore, no matter how close the mirror is to your face, your eyes treat the image as if it's ...



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