Optics Question 400
Question: Two convex lenses of focal lengths 0.3 m and 0.05 m are used to make a telescope. The distance kept between the two is
[MNR 1994]
Options:
A) 0.35 m
B) 0.25 m
C) 0.175 m
D) 0.15 m
Show Answer
Answer:
Correct Answer: A
Solution:
If final image is formed at infinity, then the distance between the two lenses of telescope is equal to length of tube $ =f _{o}+f _{e}=0.3+0.05=0.35\ m $
