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QJEEM21Phe3b1: JEE Main 2021 Physics - Class 12 JEEM21Phe3b1 Solution: An object is placed at the focus of concave lens having focal…

An object is placed at the focus of concave lens having focal length f. What is the magnification and distance of the image from the optical centre of the lens?

Multiple Choice Options

  • A 1, ∞
  • B Very high, ∞
  • C 12, f2
  • D 14, f4

Step-by-Step Verified Solution

JEE Main 2021 (Online) 31st August Morning Shift Physics - Geometrical Optics Question 109 English Explanation
U = −f

1V−1U=1−f⇒1V=−2f

V=−f2

m=VU=12

distance = f2

Option (c)

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