Physics WAEC / WASSCE 2011 Lenses & Optical Instruments
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
A
\(\frac{f_2}{f_1}\)
B
1 - \(\frac{f_2}{f_1}\)
C
\(\frac{f_2}{f_1}\) - 1
D
\(\frac{f_1}{f_2}\)