Back to Directory
NEET PHYSICSMedium

A lens is made up of 3 different transparent media as shown in the figure. A point object O is placed on its axis beyond 2f. How many real images will be obtained on the other side?

A

2

B

1

C

No image will be formed

D

3

Step-by-Step Solution

  1. Concept: The focal length of a lens depends on the refractive index of the material it is made of, as given by the Lens Maker's formula: 1f=(μ−1)(1R1−1R2)\frac{1}{f} = (\mu - 1) \left(\frac{1}{R_1} - \frac{1}{R_2}\right).
  2. Analysis: The lens is composed of 3 different transparent media, which means there are 3 distinct refractive indices (μ\mu) present within the lens.
  3. Image Formation: Because each medium has a different refractive index, each corresponding part of the lens will have a different focal length. Therefore, each part will converge the incident light rays from the point object at a different position on the principal axis.
  4. Conclusion: Since there are 3 different focal lengths, 3 distinct real images will be formed.
Practice Mode Available

Master this Topic on Sushrut

Join thousands of students and practice with AI-generated mock tests.

Get Started