How to know that the given focal length/dictance is positive or negative
Asked by | 24th Feb, 2008, 11:30: AM
Expert Answer:
How to know that the given focal length/dictance is positive or negative.
It will give in the question that the mirror is concave/convex or lens is convex/concave.
The focal length of Concave mirror/Concave lens is negative while the focal length of convex mirror/convex lens is positive as per the New Sign Cartesian convention.
Rgds
Physics Expert
Answered by | 7th Dec, 2017, 03:48: PM
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