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Light Reflection and Refraction
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09/08/2021 12:55 pm
Topic starter
(a) What is meant by (i) principal focus of a convex mirror, and (ii) focal length of a convex mirror?
(b) Draw diagram to show the action of convex 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 convex mirror.
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09/08/2021 12:57 pm
(a) (i) Principal focus of a convex mirror: The principal focus of a convex mirror is a point on its principal axis from which a beam of light rays, initially parallel to the axis, appears to diverge after being reflected from the convex mirror.
(ii) Focal length of a concave mirror: The focal length of a convex mirror is the distance from the pole (P) to its principal focus (F).
(b)