What optical instrument can best be constructed with converging lenses of focal lengths 50cm and 5cm?
A
Compound microscope
B
Galileo's telescope
C
Terrestrial telescope
D
Astronomical telescope
Verified Correct Answer: D.
Physical Principles & Numerical Solution
An astronomical telescope traditionally consists of two converging lenses with the objective having a longer focal length than the eyepiece. In this case, the 50 cm lens would serve as the objective, and the 5 cm lens as the eyepiece, which is a standard configuration for astronomical telescopes.
Source: Myschool Past Questions Archive (Record #715)