power of a lens is -2D then its focal length is
Answers
Answered by
0
Explanation:
The power of a lens is inversely proportional to its focal length.
hope this will help you ...
Answered by
2
Answer:
power of a lens is - 2D negative sign indicates it is a concave lens. focal length (in meters)=1/ power the lens, thus length =1/2=0.5m=50cm.
Similar questions