Home/
Competitive Exams/
JEE Main & Advanced/
Physics/
Ray Optics/
Question 20229
JEE Physics · Easy

Ray Optics: Lens — Object at 2f MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
Lens — Object at 2fEasyQuestion 20229

Question

Object placed at 2f from a converging lens forms image:
  1. A
    At f
  2. B
    At 2f (same size, real, inverted)
    Correct
  3. C
    At infinity
  4. D
    At 3f

Correct answer

At 2f (same size, real, inverted)

Explanation

u = −2f: 1/v = 1/f + 1/u = 1/f − 1/(2f) = 1/(2f) → v = 2f. m = v/u = 2f/(−2f) = −1. Image at 2f, same size, real, inverted.

Review Ray Optics notesStart timed chapter practice