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प्रश्न
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उत्तर
A concave mirror forms a real image equal in size to the object when the object is kept at centre of curvature, C
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संबंधित प्रश्न
A 4 cm tall object is placed on the principal axis of a convex lens. The distance of the object from the optical centre of the lens is 12 cm and its sharp image is formed at a distance of 24 cm from it on a screen on the other side of the lens. If the object is now moved a little away from the lens, in which way (towards the lens or away from the lens) will he have to move the screen to get a sharp image of the object on it again? How will the magnification of the image be affected?
A diverging lens is used in:
(a) a magnifying glass
(b) a car to see objects on rear side
(c) spectacles for the correction of short sight
(d) a simple camera
A small object is placed 150 mm away from a diverging lens of focal length 100 mm.
(i) Copy the figure below and draw rays to show how an image is formed by the lens.
Figure
(ii) Calculate the distance of the image from the lens by using the lens formula.
The letters on the front of an ambulance are written laterally inverted like 
. Give reason.
Explain the meaning of the terms focus and focal length in case of a convex mirror, with the help of suitable ray diagram.
How is the focal length of a spherical mirror related to its radius of curvature?
Define the following term in relation to concave mirror.
Principal axis
Define the following term in relation to concave mirror.
Radius of curvature
A shopkeeper wanted to fix a mirror which will give a maximum view of his shop. What type of mirror should he use? Give reason.
