Content protected from screenshots
GKFix.in
Current Affairs
General Knowledge
Categories
Concept Builder Quiz
About Us
Start Quiz
GKFix.in
Home
Current Affairs
General Knowledge
Categories
Concept Builder Quiz
Start Quiz
GKFix MCQ Question
Test your knowledge and learn something new
Home
OPTICS
Question #88123
Back to Home
View All OPTICS Questions
29 Views
Question
If a lens combination has an effective focal length of 20 cm, what is its power in dioptres?
A. +0.2 D
B. +5 D
C. +20 D
D. -5 D
Check Answer
Share on Twitter
Share on Facebook
Copy Link
Related Questions
Why is the speed of light considered a universal constant?
18
Why is the paraxial approximation important in mirror optics?
24
What is the key characteristic of light rays that allows an image to form?
17
Which country’s central bank reported that 100% of its energy exports to the US are compliant with...
(Current Affairs)
34
What was the primary objective of the Indian delegation's visit to Brazil?
(Current Affairs)
59