# Physics

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A standard biological microscope is required to have amagnification of 200.

1)When paired with a 10 eyepiece, what power objective isneeded to get this magnification? Assume that the length of thetube of a standard biological microscope is 15 .

2) What is the focal length of the objective?

• Physics101 -

1. 20.0

• Physics -

1- M_o=200x/10x=20

• Physics -

85

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