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Assuming that the blurring is intrinsic to the image (i.e. it's displayed on a computer screen and the blurring was done by software, or, say, that it's a photograph of an object through an imperfectly-focused lens), then no, no amount of optical correction will bring the original image back into focus. The information about that original image is lost, and ...


Parallel rays of light are not brought into sharp focus by spherical mirrors. They suffer a defect known as spherical aberration. Getting a sharp image requires either a parabolic mirror (as commonly seen in Newtonian reflector telescopes) or an aspheric correcting lens in front of the mirror (as in Schmidt-Cassegrain telescopes).


First of all, this is not exact. Point of intersection is half way of radius only for small mirrors id est, small surfaces of mirrors with big curvatures. First of all, you need to draw geometric situation. If we agree that according to the law of reflection ray must reflect of the mirror as it is reflecting of the plane mirror which is represented by the ...

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