Question

9. The point, on the principal axis of a concave lens, from where a beam of 1 incident parallel ray appears to diverge is called the _______ of the concave lens. *​

Answer 1

Answer:

The incident rays which are parallel to the principal axis appear to diverge from a point on the principal axis after entering through the concave lens. This point is known as the focal point of a concave lens.

Answer 2

Answer:

The point, on the principal axis of a concave lens, from where a beam of 1 incident parallel ray appears to diverge is called the focal point of the concave lens