Content protected from screenshots
GKFix.in
General Knowledge
Categories
Concept Builder Quiz
About Us
Start Quiz
Home
My Profile
General Knowledge
Categories
Concept Builder
Start Quiz
Logout
GKFix MCQ Question
Test your knowledge and learn something new
Home
OPTICS
Question #89053
Back to Home
View All OPTICS Questions
45 Views
Question
If the focal length of a lens is -0.25 m, what is its power in dioptres?
A. +4.0 D
B. +0.25 D
C. -0.25 D
D. -4.0 D
Check Answer
Share on Twitter
Share on Facebook
Copy Link
Related Questions
If Eq. (9.15) is applied to the first interface ABC, which medium has refractive index n1 and which ...
23
Why is the approximation 'NM ≈ perpendicular distance from N to principal axis' valid?
47
What is the critical angle in the context of refraction and total internal reflection?
47