JEE · NEET Previous Year Question

A microscope is having objective of focal length and eyepiece of focal length . If tube length is and image is formed at the least distance of distinct vision, what is the magnification produced by the microscope ? Take .

Topic: JEE PYQ

Answer: D. Full step-by-step solution below.

  1. A25
  2. B6
  3. C125
  4. D150

Correct answer: D

Solution

(d): Here,
Focal length of objective,
Focal length of eycpiece,
Least distance of distinct vision,
Tube length,
When the image is formed at the least distance of distinct vision, the magnification is

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