A conveying mirrors forms a real image of height 4cm of an object of height 1cm placed 20cm away the mirror.Calculate the image distance and focal length of the mirror
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Answer:
Magnification m = -v/u
-4 = -v/-20
v = -80 CM
From mirror formula
1/v + 1/u = 1/f
1/-80 + 1/-20 = 1/f
1/f = 1+4/-80
f = -16 CM
Thus focal length of converging mirror is 16 CM
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