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प्रश्न
______ is used as reflectors in torchlight.
विकल्प
Concave mirror
Plane mirror
Convex mirror
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उत्तर
Concave mirror is used as reflectors in torchlight.
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संबंधित प्रश्न
Draw ray diagrams to show the principal focus of a concave mirror.
List four characteristics of the images formed by plane mirrors.
The image of a candle flame placed at a distance of 30 cm from a mirror is formed on a screen placed in front of the mirror at a distance of 60 cm from its pole. What is the nature of the mirror? Find its focal length. If the height of the flame is 2.4 cm, find the height of its image. State whether the image formed is erect or inverted.
If the focal length of a convex mirror is 25 cm, what is its radius of curvature?
One of the following does not apply to a concave mirror this is:
(a) focal length is negative
(b) image distance can be positive or negative
(c) image distance is always positive
(d) height of image can be positive or negative
Which of the following can make a parallel beam of light from a bulb falls on it?
(a) concave mirror as well as concave lens
(b) convex mirror as well as concave lens
(c) concave mirror as well as convex lens
(d) concave mirror as well as convex lens
If the radius of curvature of a concave mirror is 20 cm, its focal length is:
The image formed by a concave mirror is of the same size as the object, if the object is placed
Give any two applications of a concave and convex mirror.
Examine the above figure and state which of the following option is correct? [one small box in the figure is equal to 1 cm]
