NEET Physics Optical Instruments MCQ Question
A simple microscope forms an image at the near point (D = 25 cm) with an angular magnification of 5. What is the focal length of the lens used?
5 cm
6.25 cm
10 cm
15 cm
Correct Answer
Detailed Explanation
For a simple microscope with image at the near point, magnification is given by m = 1 + D/f. With m = 5 and D = 25 cm, solving gives f = 5 cm.
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