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The Challenge: Make a Microscope

Kathy making the microscope sphereHow can we determine the magnifying power?

The smaller the size of the sphere, the greater its magnifying power.

This equation is used: I = 333/d where I is the magnifying power and d is the diameter of the sphere in mm.

Therefore, we can work out the magnification of these spheres:

A sphere of 1.66mm in diameter = 200X

A sphere of 3.33mm in diameter = 100X

A sphere of 1.11mm in diameter = 300X