By the end of the lesson the learner can distinguish concave (converging) from convex (diverging) mirrors.
By the end of the lesson the learner can name the parts of a spherical mirror such as the pole, centre of curvature and principal focus.
By the end of the lesson the learner can state uses of curved mirrors in everyday Kenyan life.
Transcript
[0:00] A curved mirror is part of a hollow sphere. If the reflecting surface curves inward it is concave; if it bulges outward it is convex.
[0:50] A concave mirror brings parallel light rays together to a point, so it is called a converging mirror.
[1:40] A convex mirror spreads parallel rays apart, so it is called a diverging mirror and always forms a small, upright image.
[2:30] Key parts include the pole, the centre of curvature, the principal focus and the focal length, which is the distance from the pole to the focus.
[3:20] Concave mirrors are used in torches and shaving mirrors, while convex mirrors widen the view in vehicle side mirrors and shop security mirrors.
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