10) It is desired to project the image of an object four times its actual size using a lens of focal length 20 cm. How far from the lens should the object be placed? A) 80 cm B) 5.0 cm C) 100 cm D) 25 cm E) 4.0 cm
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10) It is desired to project the image of an object four times its actual size using a lens of focal length 20 cm. How f
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10) It is desired to project the image of an object four times its actual size using a lens of focal length 20 cm. How f
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