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  4. Assertion (A) The relation among u, v and f for the spherical mirror is valid only for mirrors whose sizes are very small compared to their radii of curvature. Reason (R) The laws of reflection are strictly valid for plane surfaces but not for large spherical surfaces.

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Q. Assertion $(A)$ The relation among $u, v$ and $f$ for the spherical mirror is valid only for mirrors whose sizes are very small compared to their radii of curvature.
Reason $(R)$ The laws of reflection are strictly valid for plane surfaces but not for large spherical surfaces.

AIIMSAIIMS 2015

Solution:

The laws of reflective can be applied for any type of surface.