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प्रश्न
Define the following terms in the context of a diverging mirror:
- Principal focus
- Focal length
Draw a labelled ray diagram to illustrate your answer.
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उत्तर
- Principal focus: The principal focus of the diverging mirror is the point on the principal axis from which all incident rays appear to diverge from behind the mirror.
- Focal length: The distance between the pole and the principal focus of a spherical mirror is called the focal length.
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संबंधित प्रश्न
Explain the following term related to spherical lenses:- aperture
We can obtain an enlarged and erect image by a convex mirror.
A virtual image larger than the object can be produced by a ______.
Write true or false
A virtual image formed by a spherical mirror is always erect and situated behind the mirror.
State the two kinds of spherical mirror and distinguish them with the aid of proper diagrams.
A concave mirror forms a virtual image of size twice that of the object placed at a distance 5 cm from it. Find:
- the focal length of the mirror
- position of image
Define the following term in relation to concave mirror.
Pole
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?
