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प्रश्न
A student obtained on a screen the sharp image of a candle flame placed at the farther end of laboratory table using a concave mirror. For getting better value of focal length of the mirror, the teacher suggested to him to focus the sun. What should the student do?
(A) Should move the mirror away from the screen.
(B) Should move the mirror towards the screen.
(C) Should move the mirror and screen both towards the sun.
(D) Should move only the screen towards the sun.
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उत्तर
Initially, the screen was placed beyond the focus to capture the image of the candle flame placed at a finite distance from the mirror. So, in order to capture a bright image of the Sun (at infinity) on the screen, the student should move the mirror towards the screen.
Hence, the correct option is B.
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संबंधित प्रश्न
Define the following term in the context of spherical mirrors:- Pole
Image formed by a convex ______ is always virtual and smaller in size.
A ray of light is incident normally on a plane mirror. What will be the
angle of incidence?
Name the spherical mirror which has:
(a) virtual principal focus.
(b) real principal focus.
A coin placed at the bottom of a vessel appears to be raised when water is poured in the vessel.
Figure shows a concave mirror with its pole at P, focus F and centre of curvature C. Draw ray diagram to show the formation of image of an object OA.
Figure shows a concave mirror with its pole at P, focus F and centre of curvature C. Draw ray diagram to show the formation of image of an object OA.
For what position of object, the image formed by a concave mirror is magnified and erect?
