An object 4cm high is kept 20cm in front of mirror,which forms it's real and inverted images same size at the same point. Identity the mirror and the focal length of the mirror.
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the mirror is concave mirror, because such condition occurs when the object is placed at spherical centre of the concave mirror, hence
C=20=2f...; f=10cm
focal length of mirror is 10cm
C=20=2f...; f=10cm
focal length of mirror is 10cm
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