Q

Which statements about the principal focus of a spherical mirror are correct? (a) It lies between the pole and centre of curvature. (b) Its position depends on the size of the mirror. (c) It lies at the centre of curvature.

RRB Technicians Grade-III 24/12/2024 / Shift-I 2024
✓ Answer: C Only a
In the paraxial approximation, the principal focus lies midway between P and C.
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