Question

The magnifying power of an astronomical telescope can be increased if we

• A. increase the focal length of the objective
• B. increase the focal length of the eye-piece
• C. decrease the focal length of the objective
• D. decrease the focal length of the objective and at the same time increase the focal length of the eye piece

Answer 1

Answer: (A)

Correct answer is (a) increase the focal length of the objective