# What is the magnification of the lens of the projection apparatus if the height of the object on the slide 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 slide is 2 cm and the height of its image is 80 cm?**

The magnification of the lens of the projection apparatus is the ratio of the height of the image of an object 80 cm to the height of the object on a slide 2 cm: 80/2 = 40.

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