Part A The medium-power objective lens in a laboratory microscope has a focal le

Question

Part A

The medium-power objective lens in a laboratory microscope has a focal length fobjective = 3.80mm . If this lens produces a lateral magnification of -37.0, what is its "working distance"; that is, what is the distance from the object to the objective lens?

Express your answer using three significant figures.

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Part B

What is the focal length of an eyepiece lens that will provide an overall magnification of -115? Assume student's near-point distance is N = 25 cm.

Explanation / Answer

=> = (3.9*25)/(-115*3.8) = 0.223 mm

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