Optics Question 388
Question: In an astronomical telescope, the focal lengths of two lenses are 180 cm and 6 cm respectively. In normal adjustment, the magnifying power will be
[MP PET 1990]
Options:
A) 1080
B) 200
C) 30
D) 186
Show Answer
Answer:
Correct Answer: C
Solution:
$ |m|\ =\frac{f _{o}}{f _{e}}=\frac{180}{6}=30 $
