In a simple microscope, the lens is held at a distance d

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In a simple microscope, the lens is held at a distance d from the eye and the image is formed at the least distance (D) of distinct vision from the eye. What is the magnifying power of the microscope?

1. D / f
2. 1 + (D / f)
3. 1 + {(D - d) / f }
4. 1 + {(D + d) / f }

Correct Option: C

N/A