Question

The diagram given below shown an object O and its image I.

Without actually drawing the ray diagram state the following:

1. Type of lens (Converging/Diverging)
2. Name two optical instruments where such an image is obtained.
3. List three characteristics of the image formed if this lens is replaced by a concave mirror of focal length 'f and an object is placed at a distance `'f/2'` in front of the mirror.

Answer 1

1. Converging lens
2. Microscope and Telescope
3. Characteristic of the image formed are:
   1. Virtual image
   2. Magnified image
   3. Image behind the mirror