Question

the line passing through pole, centre of curvature and focus is known as. A) incident ray B) reflected ray C)refracted ray D) principal axis​

Answer 1

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Principal axis ✨❤

Answer 2

The line passing through centre of curvature and focus is known as the principal axis. (option D)

- There are many parts of an optical lens which play major roles in the different optical procedures.

- Similarly,the principal axis is one of the most important parts of a lens.

- This principal axis is nothing but an imaginary straight line which passes through the centre of the curvature and the focus of the lens.