| ⇦ | 
| ⇨ |
The radius of the convex surface of a plano-convex lens is 20 cm and the refractive index of material of the lens is 1.5. The focal length of lens is
Options
(a) 30 cm
(b) 50 cm
(c) 20 cm
(d) 40 cm
Correct Answer:
40 cm
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting below.
Related Questions: - A microscope is having objective of focal length 1 cm and eye-piece of focal length 6 cm.
- A series L-C-R circuit contains inductance 5 mH, capacitance 2 μF and resistance
- Light with an energy flux of 25×10⁴ Wm⁻² falls on a perfectly reflecting surface
- Perfectly black body radiates the energy 18 J/s at 300K. Another ordinary body of e=0.8
- Two solid discs of radii r and 2r roll from the top of an inclined plane
Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A microscope is having objective of focal length 1 cm and eye-piece of focal length 6 cm.
- A series L-C-R circuit contains inductance 5 mH, capacitance 2 μF and resistance
- Light with an energy flux of 25×10⁴ Wm⁻² falls on a perfectly reflecting surface
- Perfectly black body radiates the energy 18 J/s at 300K. Another ordinary body of e=0.8
- Two solid discs of radii r and 2r roll from the top of an inclined plane
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