Question

With the help of a ray diagram, explain the following terms:
(a) focus of a convex lens
(b) Optical centre of a convex lens
(c) Focal length of a convex lens​

Answer 1

Answer:

1)The principal focus of a convex lens is defined as the point on which the principal axis of the light is parallel to the principal axis that converges after the refraction from the lens.

2)Optical Centre : The optical centre is defined as the geometric centre of the curved lens

3)For a thin lens in air, the focal length is the distance from the center of the lens to the principal foci (or focal points) of the lens. For a converging lens (for example a convex lens), the focal length is positive, and is the distance at which a beam of collimated light will be focused to a single spot.

Answer 2

Explanation:

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