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प्रश्न
A student obtained a sharp image of a burning candle, placed at the farther end of a laboratory table, on a screen using a concave mirror. For getting better value of focal length of the mirror, the subject teacher suggested him for focusing a well illuminated distant object. What should the student do?
(A) He should move the mirror away from the screen.
(B) He should move the mirror slightly towards the screen.
(C) He should move the mirror as well as the screen towards the newly selected object.
(D) He should move only the screen towards the newly selected object.
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उत्तर
(B)
As the image distance is increased, the object distance would decrease and thus the mirror-screen distance should be decreased. Therefore, the mirror should be moved towards the screen.
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संबंधित प्रश्न
Explain the following term related to spherical lenses:- principal axis
An image formed by a ______ mirror is always of the same size as that of the object.
Which type of mirror can form a real image?
If a spherical mirror breaks, what type of mirrors are the individual pieces?
The radius of curvature of a convex mirror is 40 cm. Find its focal length.
Define the term Principle focus.
Define focal length.
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?
Define the radius of curvature.
