Practice question
MCQ
Question
What happens to the power of a convex lens when its surrounding medium’s refractive index increases?
Options
Choose one · Correct answer highlightedExplanation
**Power of lens** P (D) = 1/f (m), +5 D => f=1/5=0.2 m=20 cm. Virtual magnified image by convex lens when object within focal point, u
Share this question
Related blogs
Guides and insights connected to this topic
Class X Science
13 Sep 2026
Sources of Energy Notes - Conventional vs Non-Conventional, Solar, Nuclear and Environmental Impact
Explore class 10 notes on energy sources, comparing conventional and non‑conventional types, including solar and nuclear power and their environmental impact.
VIDYANAND JHA
Read
Class X Science
13 Sep 2026
Electricity Notes - Electric Current, Potential, Ohm's Law, Resistance, Heating Effect and Power
Learn the basics of electric current, circuits, potential, Ohm's law, resistance, heating effect and power in clear, concise notes.
VIDYANAND JHA
Read
Class X Science
13 Sep 2026
The Human Eye and Colourful World Notes - Eye Defects, Prism, Atmospheric Refraction and Scattering
Explore the human eye's structure—cornea, iris, lens, retina—and learn about defects, prism effects, atmospheric refraction and light scattering.
VIDYANAND JHA
Read
Install Examtube
Add our app to your home screen for a better experience.
Start typing to see suggestions
Discussion
Comments
Please log in to join the discussion.
Login to commentNo comments yet. Be the first to start the discussion.