Question

The diameter of the circular outline of a spherical lens is
A. optical centre
В.
centre of curvature
C. operture
D. principal axis​

Answer 1

Answer:

hey

Explanation:

the effective diameter of the circular outline of a spherical lens is aperture.

the correct answer is (c)

Answer 2

Option  D is the right answer. The diameter of the circular outline of a spherical lens is called the principal axis.

• Spherical lenses are optical lenses with a curved surface that is used to diverge or converge light.
• There are concave and convex lenses.
• Principal axis is a straight line passing through the pole, touching through the center of curvatures of the segments of the mirror.
• In actual practice it coincides with the diameter of the spherical lens.

• The beams coming parallel to the principal axis converges at the principal focus