'Diopter diverging lens' presentation slideshows

Example: What kind of lens must be used, in order to give an

Example: What kind of lens must be used, in order to give an erect image 1/5 as large as an object placed 15 cm in front of it?. M = -q/p ? -q/p=1/5 So q = -p/5 = -15/5 = -3 cm 1/p + 1/q = 1/f ? 1/15 - 1/3 = 1/f 1/f = (1-5)/15 f = -15/4 = -3.75 cm Diverging lens. Magnifier.

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