Question

The effective diameter of the lens through which refraction takes place is known as Aperture. Is the statement true or false?

Answer 1

Hint: We know that the surface of an object is very important for the refraction as well as a reflection to get an image on the screen. Because a ray of light falls on this surface area of the object.

Complete step-by-step answer:
The given statement is true. The effective diameter of the lens through which refraction takes place is known as Aperture. It is an opening through which light travels and it also determines the cone angle of rays that come to the focus in the image plane.
Aperture is an area of the surface required for refraction or reflection so that we can see image formation for different object distances.

Additional information:
Some of the terminologies related to lens:
principal axis: Principal axis of a lens is a straight line passing through the center of curvature of the two spherical surfaces.
optic center: When a ray of light incident on a lens such that after refraction through the lens the emergent ray is parallel to the incident ray, then the point at which the refracted ray intersects the principal axis is called the optic center.
principal focus: A narrow parallel beam of light incident on a lens parallel to the principal axis and close to it, after refraction converges to a fixed point on the principal axis in the case of a converging lens or appears to diverge in the case of the diverging lens.
Focal length: Distance between the optic center and the principal focus.

Note:
A lens is an optical medium bounded by two surfaces of which at least one surface is spherical.
The concave lens is thinner at the center and thicker at the edges.
The convex lens is thicker in the middle than at the edges.