A point within the lens, where a line drawn through the diameter of lens meets principal axis is known as

Focal length

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Optic Center

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Aperture

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Center of curvature

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Solution

The correct option is B Optic Center

Correct answer is (b).

Optic centre is a point within the lens, where a line drawn through the diameter of lens meets principal axis and through which light passes without undergoing any deviation so a ray of light passing through the optical center does not changes its direction.

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Similar questions

Q. Choose the correct pair.

a. Centre of curvature	i. Effective diameter of the circular outline of a lens
b. Principal axis	ii. Line joining the centre of curvatures of the two surfaces of a lens
c. Optical centre	iii. Centre of the sphere of which the lens forms a part
d. Aperture	iv. Central point of a lens

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Q. A point on the principal axis of a lens, to which light rays parallel to the principal axis converge after passing through the lens, is ............

Q. A point object

O

is placed on the principal axis of a convex lens of focal length

f = 20 c m

at a distance of

40 c m

to the left of it. The diameter of the lens is

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. An eye is placed

60 c m

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below the principal axis. The maximum value of

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to see the image is

A ray of light, after rerfraction through a concave lens emerges parallel to the principal axis. (a) Draw a ray diagram to show the incident ray when produced meets the principal axis at point F. (b) Name the point F.

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