Question

positive or negative
U. V. F
concave and convex
​

Answer 1

Answer:

convex mirror

-U

+V

-F

concave mirror

-U

-V

-F

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Answer 2

Answer:

(The image distance is measured from the principal point to the point at which the image is formed.) Now the convex lensconverges the incident rays. Hence the rays converge to a single point infront of the lens. ... So f is positive for a convex lens andnegative for a concave lens.

Explanation:

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