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A A convex lens of focal length 5 cm B A concave lens of focal length 5 cm D A convex lens of focal length 50 cm
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A convex lens is also used as a simple microscope. The object is kept between the focal length and mirror so that a virtual, erect and magnified image is formed. Smaller focal length has more power and is suitable for larger magnification. Hence, convex lens of focal length 5 cm is preferred.
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