A compound microscope has an objective lens of focal length 9.70mm with an eyepi

Question

A compound microscope has an objective lens of focal length 9.70mm with an eyepiece of focal length 15.5mm , and it produces its final image at infinity. The object to be viewed is placed 2.00mmbeyond the focal point of the objective lens.

Part A

How far from the objective lens is the first image formed?

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Part B

What is the overall magnification of this microscope?

A compound microscope has an objective lens of focal length 9.70mm with an eyepiece of focal length 15.5mm , and it produces its final image at infinity. The object to be viewed is placed 2.00mmbeyond the focal point of the objective lens.

Part A

How far from the objective lens is the first image formed?

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Part B

What is the overall magnification of this microscope?

Explanation / Answer

1/S + 1/S' = 1/fo

1/11.7 + 1/S' = 1/9.7

S' = 56.745 mm

Mo = S'/fo = 5.85

Me = 25/fe = 25/15.5 = 1.61

M = Mo*Me = 9.4185

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