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प्रश्न
What kind of mirrors are used in big shopping centres to watch the activities of the customers?
उत्तर
Convex mirrors are used in big shopping centres to watch the activities of the customers, as these mirrors have a wider field of view and always form virtual, erect and small-sized images of a large number of objects at the same time.
संबंधित प्रश्न
Find the focal length of a convex mirror whose radius of curvature is 32 cm.
If the focal length of a spherical mirror is 12.5 cm, its radius of curvature will be:
(a) 25 cm
(b) 15 cm
(c) 20 cm
(d) 35 cm
The image formed by a spherical mirror is virtual. The mirror will be:
(a) concave
(b) convex
(c) either concave or convex
(d) metallic
An object is kept at a distance of 5 cm in front of a convex mirror of focal length 10 cm. Calculate the position and magnification of the image and state its nature.
An object is placed at a distance of 10 cm from a convex mirror of focal length 5 cm.
(a) Draw a ray-diagram showing the formation image
(b) State two characteristics of the image formed
(c) Calculate the distance of the image from mirror.
Draw ray diagrams to represent the nature, position and relative size of the image formed by a convex lens for the object placed:
at 2F1,
Light travels in the same straight line path while passing through different media.
Magnification produced by a rear view mirror fitted in vehicles
The distance between an object and a convex lens is changing. It is noticed that the size of the image formed on a screen is decreasing. Is the object moving in a direction towards the lens or away from it?
A convex rearview mirror is preferred over a plane mirror in a car. Why?
