| ⇦ | 
| ⇨ |
An object is placed 30 cm away from a convex lens of focal length 10 cm and a sharp image is formed on a screen. Now, a concave lens is placed in contact with the convex lens. The screen now has to be moved by 45 cm to get a sharp image again. The magnitude of focal length of the concave lens is (in cm)
Options
(a) 72
(b) 60
(c) 36
(d) 20
Correct Answer:
20
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting below.
Related Questions: - The masses of two radioactive substances are same and their half lives
- A U²³⁵ reactor generates power at a rate of P producing 2×10⁸ fission per second.
- A susceptibility of a certain magnetic material is 400. What is the class
- Two pendulums A and B are oscillating simultaneously with time period
- The given graph represents V-I characteristic for a semiconductor device
Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The masses of two radioactive substances are same and their half lives
- A U²³⁵ reactor generates power at a rate of P producing 2×10⁸ fission per second.
- A susceptibility of a certain magnetic material is 400. What is the class
- Two pendulums A and B are oscillating simultaneously with time period
- The given graph represents V-I characteristic for a semiconductor device
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply