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प्रश्न
Give two uses of a convex mirror. Explain why you would choose convex mirror for these uses.
उत्तर
Uses of convex mirror are as follows:
(a) Convex mirror is used for vigilance purpose in big shopping centres to keep a watch on the activities of the customers, as this mirror has a wider field of view and always forms virtual, erect and small-sized images of the large number of objects at the same time.
(b) Convex mirror is also used as a rear-view mirror in vehicles, as it has a wider field of view and always forms virtual, erect and small-sized images of the large number of objects at the same time.
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संबंधित प्रश्न
Describe with a suitable diagram, how a convex mirror diverges a parallel beam of light rays. Mark clearly the pole, focus and centre of curvature of concave mirror in this diagram.
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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(c) a concave mirror
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Figure
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(b) Which mirror is concave
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(a) mirror A is concave and mirror B is convex
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(c) mirror A is concave and mirror B is plane
(d) mirror A is convex and mirror B is concave
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(b) The mirror and lens are both concave
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(d) The mirror is convex but the lens is concave
Write true or false
At the point of incidence, a line drawn at right angles to the surface, separating the two media, is called the normal.
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