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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?
An image formed by a ______ mirror is always of the same size as that of the object.
Explain the following term:
Incident ray
Draw diagram/diagrams to show them.
Explain the meaning of the terms focus and focal length in case of a convex mirror, with the help of suitable ray diagram.
Define the term Normal.
Complete the following diagrams shown in the following figures by drawing the reflected rays.
If the focal length of a spherical mirror is 10 cm, what is the value of its radius of curvature?
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?
In normal adjustment, for a refracting telescope, the distance between objective and eye piece is 30 cm. The focal length of the objective, when the angular magnification of the telescope is 2, will be ______.
