An astronomical telescope often fold angular magnification has a length of 44 cm. The focal length of the object is
A. 4 cm
B. 40 cm
C. 44 cm
D. 440 cm
Answer:B
An astronomical telescope often fold angular magnification has a length of 44 cm. The focal length of the object is
A. 4 cm B. 40 cm C. 44 cm D. 440 cm