Maharashtra State PSC Model Paper 2

CONCEPT:

• Lens: A lens is a piece of transparent refracting material bounded by two spherical surfaces or one spherical and another plane surface.
• A lens is used in microscopes, cameras, telescopes, projectors, etc.
• Types of lenses:
  1. Convex lens
  2. Concave lens
• ​Convex lens: A lens that is thick at the center and thin at the edges is called a convex lens.
• Concave lens: A lens that is thin at the center and thick at the edges is called a concave lens.

EXPLANATION:

The image formed by the convex lens for different positions of the object is given as,

• From the above table it is clear that when the object is between F and 2F, the image will be real and magnified.
• Hence, option 2 is correct.