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प्रश्न
Explain the following term related to spherical lenses:- optical centre
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उत्तर
Optical centre:-
The central point of the lens is known as optical centre. It is represented as O. The optical centre of a lens has a property that a ray of light passing through it does not suffer any deviation and goes straight.
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संबंधित प्रश्न
A ray of light is incident normally on a plane mirror. What will be the:
- angle of incidence?
- angle of reflection?
Name the spherical mirror which has:
(a) virtual principal focus.
(b) real principal focus.
What is a spherical mirror?
Explain the following terms :
Pole, Centre of curvature, Radius of curvature, Principal axis. Show them on separate diagrams for each of the concave and convex mirrors.
Name the kind of mirror used to obtain:
A virtual and diminished image
How is the focal length of a spherical mirror related to its radius of curvature?
Upto what maximum distance from a concave mirror, the image can be obtained? What will be the location of object for it?
A real and enlarged image can be obtained by using a
Define the following term in relation to concave mirror.
Radius of curvature
An object is placed in front of a concave mirror as shown in the following figure. By scale drawing, find the nature of the image. Given f = 10 cm, v = 30 cm.
