Question

what is pricipal foces​

Answer 1

Explanation:

the point on principal axis where all the rays after reflection meet in case of concave mirror and is directed towards in case of convex can be said as principal focus for spherical mirrors

Answer 2

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In geometrical optics, a focus, also called an image point, is the point where light rays originating from a point on the object converge. Although the focus is conceptually a point, physically the focus has a spatial extent, called the blur circle.

Explanation:

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