Question

Explain principal focus of convex mirror and optical centre of convex lens?

Answer 1

Explanation:

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The principal focus (denoted by F in the figure) is defined as the point on the principal axis where the light rays traveling parallel to the principal axis after reflection actually meet (for aconcave mirror) or appear to meet (for a convex mirror).

optical centre of convex lens is the geometrical center of the lens.it is the point at which the ray of light afterit passes into the lens passes undeviated.