COMEDK 2023 Shift 1 Paper

The magnifying power (MP) of a simple microscope when the final image is formed at the least distance of distinct vision (which is generally taken as 25‌cm or D ) can be calculated using the formula:
MP=1+‌

D

f

Where:
D is the least distance of distinct vision ( 25‌cm in this case), and f is the focal length of the convex lens used in the simple microscope.
Given in the question, f=10‌cm. Substituting the given values into the formula gives:
MP=1+‌

25

10

=1+2.5=3.5
Hence, the magnifying power of the simple microscope is 3.5 .
Therefore, the correct answer is Option B.