| ⇦ | 
| ⇨ |
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: - For the normal eye, the cornea of eye provides a converging power of 40D
- A particle moves along with x-axis.The position x of particle with respect to time
- A straight conductor of length 0.4 m is moved with a speed of 7 ms⁻¹perpendicular
- A beam of electron passes undeflected through mutually perpendicular
- Three identical spherical shells, each of mass m and radius r are placed
Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- For the normal eye, the cornea of eye provides a converging power of 40D
- A particle moves along with x-axis.The position x of particle with respect to time
- A straight conductor of length 0.4 m is moved with a speed of 7 ms⁻¹perpendicular
- A beam of electron passes undeflected through mutually perpendicular
- Three identical spherical shells, each of mass m and radius r are placed
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