| ⇦ | 
| ⇨ |
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: - A ship A is moving westwards with a speed of 10 km/h and a ship B 100 km
- If voltage across a bulb rated 220 volt-100 Watt drops by 2.5% of its rated value
- A ball rolls off the top of stair way with a horizontal velocity of magnitude 1.8 m/s
- Current in a coil changes from 4 A to zero in 0.1 second and the emf induced is 100V
- Two particles A and B having equal charges, after being accelerated
Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A ship A is moving westwards with a speed of 10 km/h and a ship B 100 km
- If voltage across a bulb rated 220 volt-100 Watt drops by 2.5% of its rated value
- A ball rolls off the top of stair way with a horizontal velocity of magnitude 1.8 m/s
- Current in a coil changes from 4 A to zero in 0.1 second and the emf induced is 100V
- Two particles A and B having equal charges, after being accelerated
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