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 magnifi...

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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

\(\frac{f_1}{f_2}\)

Optical Instruments

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