JEE · NEET Previous Year Question

Five persons and recorded object distance and image distance using same convex lens having power +5 D as and respectively. Identify correct statement

Topic: JEE PYQ

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

  1. AReadings recorded by and persons are incorrect
  2. BReadings recorded by and persons are incorrect
  3. CReadings recorded by all persons are correct
  4. DReadings recorded by person are incorrect

Correct answer: D

Solution

(d) For a convex lens with power , the focal length is .
The lens formula is . Checking each measurement:
Correct;
Correct;
Incorrect;
Correct;
Correct.
Only 's readings do not satisfy the lens formula.

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