Priya wears +1.5 D glasses to achieve normal vision from 25 cm onwards. She employs a 20 D lens as a simple microscope to view an object. Determine the maximum magnifying power if she uses the microscope together with her glasses.

Step-by-step solution

The power of the simple microscope lens is given as P = 20 D . The focal length of the microscope lens is: f = 100 P = 100 20 = 5 cm Priya wears glasses to achieve normal vision from 25 cm onwards. When she uses the microscope together with her glasses, her eye effectively behaves as a normal eye with a near point (least distance of distinct vision) of D = 25 cm . The maximum magnifying power of a simple microscope is achieved when the final image is formed at the near point. The formula for maximum magnifying powe