find the distance of the image from the convex mirror if the object is kept at 25 cm from it. the radius of curvature of the mirror is 200 cm?
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1/v + 1/u = 1/f
1/v = 1/f - 1/u
1/v = 1/100 -1/-25
1/v = -25 - 100/ 100*-25 (cross-multiplication used here)
1/v = -125/-2500
1/v = 1/20
v = 20cm
As the value of v is positive, according to sign convention the image is formed behind the mirror.
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