Choose the correct formula for magnifying power of a simple microscope from the following.
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → $m=1+\frac{d}{f}$
Magnifying power (m) of microscope,
$m=1+\frac{d}{f}$
where, d = nearest distinct vision distance (= 25 cm)
f = focal length of lens