Question

4. The point, on the principal axis of a concave lens, from where a beam of incident
parallel ray appears to diverge, is called the
of the concave lens
5. An object should be placed at the
point' so that a convex lens
forms its real and inverted image of the same size.​

Answer 1

Explanation:

1st que.

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.