Question

I. Answer the following questions

1. Which lens always form virtual and diminished image?

2. Match the following
Column-I
Column-II
i) At centre of curvature
i) Object at infinity
p) Point size is formed
Q) Real inverted same size
3. What are the materials required to find out relation among image distance, object
distance and focal length of biconvex lens?
4. In an experiment of finding focal length of lens the observation are as shown in
the table.
U in cm)
40
30
20
V in cm)
24
30
38
5. In which situation, the value of focal length of a convex lens is equal to the value
of image distance?
6. Where should we place an object before a convex lens to get real, inverted and
diminished image?
7. Real, inverted and magnified image is formed by convex lens. Find the place of the
object on the principal axis?
8. An object is placed at the focus of a concave lens. Where will its image be formed?
9. Mention the position and nature of image formed by a concave lens when object is
kept on its principle axis at certain distance other than infinity?
10. “Radius of curvature of a lens lies only on principal axis”. How can you
support this statement?​

Answer 1

Explanation:

inverted and magnified image is formed by convex lens. Find the place of the

object on the principal axis?

8. An object is placed at the focus of a concave lens. Where will its image be formed?

9. Mention the position and nature of image formed by a concave lens when object is

kept on its principle axis at certain distance other than infinity?

10. “Radius of curvature of a lens lies only on principal axis”. How can