Question

The magnifying power of an astronomical telescope can be increased by:

• A. increasing the focal length of eye piece
• B. increasing the focal length of objective and decreasing that of eye piece
• C. decreasing the focal length of objective and increasing that of eye piece
• D. increasing the focal length of objective

Answer 1

Answer: (B)

Correct answer is (b) increasing the focal length of objective and decreasing that of eye piece