When an object is at a distance x1 and x2 from the poles of a concave mirror, images of same magnification are formed. The magnitude of focal length of the mirror is ?
a) (x1 +x2)/2
b) (x1 - x2)/2
C) x1 + x2
D) x1 - x2
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Ans. is (a) ... solution is in the pic ...
hope it helps.... :)
hope it helps.... :)
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