1.

(a) Define (i) principal focus of a concave mirror, and (ii) focal length of a concave mirror. (b) Draw diagram to represent the action of a concave mirror on a beam of parallel light rays. Mark on this diagram principal axis, focus F, centre of curvature C, pole P and focal length f, of the concave mirror.

Answer»

(a) Define (i) principal focus of a concave mirror, and (ii) focal length of a concave mirror.

(b) Draw diagram to represent the action of a concave mirror on a beam of parallel light rays. Mark on this diagram principal axis, focus F, centre of curvature C, pole P and focal length f, of the concave mirror.



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