Optics Question 411
Question: The length of a telescope is 36 cm. The focal lengths of its lenses can be
[Bihar MEE 1995]
Options:
A) 30 cm, 6 cm
B) ? 30 cm, ? 6 cm
C) 30 cm, ? 6 cm
D) ? 30 cm, 6 cm
Show Answer
Answer:
Correct Answer: A
Solution:
Total length $ L=f _{o}+f _{e} $ and both lenses are convex.