Optics Question 130
Question: If the focal length of the objective lens and the eye lens are 4 mm and 25 mm respectively in a compound microscope. The length of the tube is 16 cm. Find its magnifying power for relaxed eye position
Options:
A) 32.75
B) 327.5
C) 0.3275
D) None of the above
Show Answer
Answer:
Correct Answer: B
Solution:
By using $ {m _{\infty }}=\frac{({L _{\infty }}-f _{o}-f _{e})D}{f _{o}f _{e}} $
$ =\frac{(16-0.4-2.5)\times 25}{0.4\times 2.5} $ = 327.5
