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▶Bcoz real image comes left side of mirror and virtual comes right side of mirror
▶Bcoz convex mirror bigger image
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a) Real image is always inverted.According to the cartesian graph,inverted images always lie on the negative side of the graph.So, the magnification of real images are always taken as negative .Whereas virtual image is always erect and lie on the positive side on the cartesian graph. So, the magnification of virtual images ate taken as positive
b) convex mirrors are used in rear view mirror because they have larger field of view than concave mirrors.So,convex mirrors are used in rear view mirrors
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