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प्रश्न
Draw separate diagram for the formation of virtual image of an object by a concave mirror.
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उत्तर
A concave mirror creates an image behind it when an object is positioned between its pole and focus. An enlarged, erect, and virtual image of the thing is created.
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संबंधित प्रश्न
A student focused the Sun rays using an optical device 'X' on a screen S as shown.
From this it may be concluded that the device 'X' is a (select the correct option)
(A) Convex lens of focal length 10 cm.
(B) Convex lens of radius of curvature 20 cm.
(C) Convex lens of focal length 20 cm.
(D) Concave mirror of focal length 20 cm.
Explain the following term related to spherical lenses:- aperture
State the kind of mirror used
(a) by a dentist, and
(b) as a street light reflector.
When an object of height 1 cm is kept at a distance 4 cm from a concave mirror, its erect image of height 1.5 cm is formed at a distance 6 cm behind the mirror. Find the focal length of mirror, by drawing.
Does the mirror name by your form a real image for all locations? Give a reason for your answer.
AB is the object, A1B1 is its image. MM' is the position of the mirror. Complete the ray diagram and find the position of the center of curvature and focus of the mirror. Also, measure the focal length.
An object is placed at a distance of 0.25 m
in front of a plane mirror. The distance between the object and image will be ______.
Size of image of an object by a mirror having a focal length of 20 cm is observed to be reduced to 1/3rd of its size. At what distance the object has been placed from the mirror? What is the nature of the image and the mirror?
