Question

Study the diagram given below.

1. Name the lens LL’.
2. What are the points O and O’ called?
3. Complete the diagram to form the image of the object AB.
4. State the three characteristics of the image.
5. Name a device in which this action of lens is used.

Answer 1

1. LL' lens is a convex lens.
2. O and O' are known as first and second focal points respectively.
3. 
   
4. Three characteristics of image are
   1. Image is virtual
   2. Erect
   3. Magnified
5. Such action of lens is used in a magnifying glass or a simple microscope.