Question

an object is placed at a distance of 15 cm from a concave lens of focal length 30 cm list four characteristics nature position at cetera of the image formed by lens

Answer 1

A convex lens is thicker at the centre than at the edges. ... When parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus. The distance between the principal focus and the centre of the lens is called the focal length.

Answer 2

1. image is smaller
2. it is virtual
3. it is erect
4. it forms on the same side of the object
5. it is at the distance of 10 cm from the lens