Values(signs) of focal length ,u , v in cancave , cancex lens and mirror
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I/V-1/U=1/F , u is object distance always negative, F I'd focal length negative for concave lens and concave mirror v is image distance depends on nature of image formed
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In concave mirror : f = negative
u = negative
v = negative
In convex mirror : f = positive
u = negative
v = positive
u = negative
v = negative
In convex mirror : f = positive
u = negative
v = positive
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