WAEC - Physics (2011 - No. 30)
The focal length of the eye-piece of an astronomical telescope is f1, while the focal length of the object is f2. Fro normal adjustment, the angular magnification is given by
\(\frac{f_2}{f_1}\)
1 - \(\frac{f_2}{f_1}\)
\(\frac{f_2}{f_1}\) - 1
\(\frac{f_1}{f_2}\)