The Focal Lengths of the Objective Lens and the Eyepiece

question 71

Multiple Choice

The focal lengths of the objective lens and the eyepiece in a microscope are 2.90 mm and 2.50 cm,respectively.An object is placed 3.00 mm from the objective.The image of this object is viewed with the eyepiece adjusted for minimum eyestrain for persons with a near point of 25 cm.What is the distance between the objective and the eyepiece?

• A)9.9 cm
• B)9.0 cm
• C)15 cm
• D)11 cm
• E)13 cm

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