The focal lengths of the objective lens and the eyepiece of a microscope are 0.50 cm and 2.0 cm,respectively,and their separation adjusted for minimum eyestrain is 6.0 cm.If the microscope is focused on a small object,what is the distance between the object and the objective lens?
A)0.31 cm
B)0.42 cm
C)0.49 cm
D)0.57 cm
E)0.73 cm

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The Answer of The focal lengths of the objective lens and the eyepiece of a microscope are 0.50 cm and 2.0 cm,respectively,and their separation adjusted for minimum eyestrain is 6.0 cm.If the microscope is focused on a small object,what is the distance between the object and the objective lens?
A)0.31 cm
B)0.42 cm
C)0.49 cm
D)0.57 cm
E)0.73 cm

The Focal Lengths of the Objective Lens and the Eyepiece