write the rules of sign convention? say correct answer pls
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Sign Convention for Spherical Mirrors (Concave and Convex Mirrors) Distances are to be measured from the pole (vertex) of the mirror marked by point V in the figure. Distances measured along the direction of the incident ray are positive. The distance measured opposite the direction of the incident ray are negative
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the u is always negative for mirror and lens also
the f is negative for concave mirror and lens and is positive for convex mirror and lens
the v cannot be negative in convex mirror and cannot be positive for convex lens
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