Help
Contact
For teachers and institutes
Search courses, problems, tests…
A
A
>_
StemPy Lab
Courses ▾
Problems ▾
Practice ▾
Mock Tests
Classes
Groups
Community ▾
A
A
How can you tell a concave lens from a convex lens by touch? | StemPy Lab
Quizzes
/
How can you tell a concave lens from a convex lens by touch?
Physics
Easy
High School (9–10)
Optics › Lenses and Optical Instruments
Created by
StemPy Lab
How can you tell a concave lens from a convex lens by touch?
A concave lens is thicker in the middle
They feel exactly the same
A concave lens is thinner in the middle than at the edges
A concave lens is heavier
Check Answer
Log in to save
Tag someone
⚑ Report
← All Quizzes
← A thin beam runs parallel to the principal axis and passes through a convex lens. Which picture shows where it goes next?
A convex lens focuses sunlight to a sharp spot 24 cm from the lens. What is its focal length? →
More on
Optics › Lenses and Optical Instruments
Discussion (0)
Log in
to join the discussion.
Loading…
All questions on this topic →
Problems on this topic
A convex lens of power +6 D is placed in contact with a concave lens of power -2.5 D.
Medium
A doctor prescribes spectacles of power -3.5 D for a student who cannot see distant things clearly.
Medium
Find the power of (a) a convex lens of focal length 80 cm, and (b) a concave lens of focal length…
Easy
A convex lens forms a real image that is 4 times as large as the object.
Hard
All problems on this topic →