# What is the magnification of the lens of the projection apparatus if the height of the object on the transparency is 2 cm

May 27, 2020 | Education

| **What is the magnification of the lens of the projection apparatus if the height of the object on the transparency is 2 cm and on the screen is 50 cm? What is the focal length and optical power of such a lens equal?**

decision

G = 50/2 = 25;

F = 0.002 m;

D = 500 diopters

The answer is 500 diopters

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