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JEE Main 20248 AprilEvening Shift
Exam
JEE Main
Year
2024
Date
8 April
Shift
Evening Shift
Subject
Physics
Chapter
Ray Optics

JEE Main 2024 · 8 April · Evening Shift · Physics · Ray Optics

The position of the image formed by the combination of lenses is :

The position of the image formed by the combination of lenses is : The position of the image formed by the combination of lenses is :

Options

  1. A15 cm15 \mathrm{~cm} (right of second lens)
  2. B30 cm30 \mathrm{~cm} (left of third lens)
  3. C15 cm15 \mathrm{~cm} (left of second lens)
  4. D30 cm30 \mathrm{~cm} (right of third lens)

Correct answer

D. 30 cm30 \mathrm{~cm} (right of third lens)

Step-by-step solution

For lens 1:f1=10,u=−30,v=1: \mathrm{f}_1=10, \mathrm{u}=-30, \mathrm{v}= ? v=ufu+f=−30×10−30+10=15v=\frac{u f}{u+f}=\frac{-30 \times 10}{-30+10}=15 For lens 2: f1=−10,u=10,v=\mathrm{f}_1=-10, \mathrm{u}=10, \mathrm{v}= ? v=ufu+f=10×−1010−10=∞v=\frac{u f}{u+f}=\frac{10 \times-10}{10-10}=\infty
For lens 3:f=30,u=−∞,v=3: \mathrm{f}=30, \mathrm{u}=-\infty, \mathrm{v}= ? So v will be 30 .
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