Question

what is principal axis of a concave lens?​

Answer 1

Answer:

A line passing through the optical center of the lens and perpendicular to both the faces of the lens is called principal axis.

Explanation:

Note that each lens has two focal points - one on each side of the lens. Unlike mirrors, lenses can allow light to pass through either face, depending on where the incident rays are coming from. ... The distance from the mirror to the focal point is known as the focal length (abbreviated by f).

Answer 2

Answer:

A line passing through the optical center of the lens and perpendicular to both the faces of the lens is called principal axis

Explanation:

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