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प्रश्न
What is the advantage of using a convex mirror as rear-view mirror in vehicles as compared to a plane mirror? Illustrate your answer with the help of labelled diagrams.
उत्तर
A convex mirror has a wider field of view, and always forms virtual, erect and small-sized images of a large number of objects at the same time. Size of the image formed by a plane mirror is equal to the size of the object; hence, it has a small field of view as compared to the convex mirror. Thus, a convex mirror is used as a rear view mirror in a car.
Following ray diagram explains it all:
संबंधित प्रश्न
What is the nature of a mirror having a focal length of, +10 cm?
What type of mirror should be used as a shop security mirror?
A man standing in front of a special mirror finds his image having a very small head, a fat body and legs of normal size. What is the shape of:
(a) top part of the mirror?
(b) middle part of the mirror?
(c) bottom part of the mirror?
Give reasons for your choice.
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 6 cm from a convex mirror of focal length 12 cm. Find the position and nature of the image.
An object placed 20 cm in front of a mirror is found to have an image 15 cm (a) in front of it, (b) behind the mirror. Find the focal length of the mirror and the kind of mirror in each case.
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
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.
The nature of image formed by a convex mirror when the object distance from the mirror is less than the distance between pole and focal point (F) of the mirror would be ______.
The most common example of a convex mirror is the make – up mirror.
