The Focal Lengths of the Objective Lens and the Eyepiece

question 3

Multiple Choice

The focal lengths of the objective lens and the eyepiece in a microscope are 0.29 cm and 2.50 cm,respectively.An object is placed at 0.30 cm from the objective lens and the image of this object is viewed with the eyepiece adjusted for minimum eyestrain for persons with a near point of 25 cm.The magnitude of the final overall magnification of the microscope is closest to

• A)100.
• B)200.
• C)300.
• D)410.
• E)500.

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