Multiple part question. Please answer all parts. One correct answer per part. In

Question

Multiple part question. Please answer all parts. One correct answer per part.

In a optical microscope, a objective with focal length = 0.5 cm is used. If the objective lens has a magnification of 100x, what is the distance between the objective lens and the object (i.e. d_0)? 0.495 cm 0.505 cm 49.5 cm 50 cm 50.5 cm Assume the distance between the objective and the eyepiece is 55 cm and the magnification of the eyepiece is 10x. What is the focal length of the eyepiece? 4.09 cm 4.59 cm 5 cm 5.05 45 cm

Explanation / Answer

Magnification

M=-di/do=100

di=-100d0

From thin lens formula

1/f =1/di + 1/do

1/0.5 = -1/100do + 1/do

do=0.495 cm

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