| ⇦ | 
| ⇨ |
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 density of ice is 0.9 g/cc and that of sea water is 1.1 g/cc
- An object is placed at a distance of 10 cm from a co-axial combination of two lenses
- If force is proportional to square of velocity, then the dimension of proportionality
- A bullet emerges from a barrel of length 1.2 m with a speed of 640 ms⁻¹.
- The potential energy of a long spring when stretched by 2 cm is U.
Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The density of ice is 0.9 g/cc and that of sea water is 1.1 g/cc
- An object is placed at a distance of 10 cm from a co-axial combination of two lenses
- If force is proportional to square of velocity, then the dimension of proportionality
- A bullet emerges from a barrel of length 1.2 m with a speed of 640 ms⁻¹.
- The potential energy of a long spring when stretched by 2 cm is U.
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