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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:- centres of curvature
Explain the following term related to spherical lenses:- principal focus
How is a spherical mirror used to diverge a beam of light from a point? Name the type of mirror used.
Complete the following diagrams in Figure by drawing the reflected rays for the incident rays 1 and 2.
What is meant by magnification? Write its expression. What is its sign for the (a) real (b) virtual, image?
Upto what maximum distance from a concave mirror, the image can be obtained? What will be the location of object for it?
Define the following term:
convex mirror
Complete the following diagrams shown in the below figure by drawing the reflected ray for each incident ray.
