Question

Aperture and optical centre are only in lenses?​

Answer 1

Answer:

because optical centre and aperture are imaginary just like normal ray

Answer 2

Answer:

Aperture is present in both lenses as well as mirrors. While the optical centre is only present in a lens and not in a mirror.

- Diameter of the reflecting surface is called its Aperture.

Explanation:

Do not confuse the terms Optical centre and the Centre of curvature.

• Optical centre is the centre of the lens.

Whereas

• A mirror is a small part of a complete sphere. That sphere has a centre which is known as center of curvature of the spherical mirror.

Hope you are clear now.

Thank You.