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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
Where would the image be formed by a convex mirror if the object is placed:
between infinity and pole of the mirror?
Draw labelled ray-diagrams to show the formation of image in both the case.
How will you distinguish between a plane mirror, a concave mirror and a convex mirror without touching them?
Draw a labelled ray diagram to show the formation of image of an object by a convex mirror. Mark clearly the pole, focus and centre of curvature on the diagram.
The magnification produced by a spherical mirror and a spherical lens is + 0.8.
(a) The mirror and lens are both convex
(b) The mirror and lens are both concave
(c) The mirror is concave but the lens is convex
(d) The mirror is convex but the lens is concave
An object is placed at a distance of 100 cm from each of the above lenses A and B. Calculate (i) image distance, and (ii) magnification, in each of the two cases.
The focal length of a convex mirror is equal to its radius of curvature.
Write true or false
The focal length of a convex mirror is equal to its radius of curvature.
A convex mirror is used
List four properties of the image formed by a convex mirror when object is placed between focus and pole of the mirror.
Why a convex mirror is preferred for rearview mirrors in cars?
