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A convex lens of power + 6D is placed in contact with a concave

MEREK : power 4d

A convex lens of power + 6D is placed in contact with a concave

power 4dThe power of a lens is +4D. Find the focal length of this lens. An object is placed at a distance of 50 cm from the optical centre of this lens. State the naturePower4D merupakan situs judi slot on terpercaya dan terlengkap yang dilengkapi dengan lisensi resmi dari PAGCOR atau Philippine Amusement and Gaming Corporation.

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