AIIMS 2019 Physics Telescopes MCQ Question

The angular magnification $M$ of a telescope is given by the formula $M = \frac{f_o}{f_e}$, where $f_o$ is the focal length of the objective lens and $f_e$ is the focal length of the eyepiece lens. In this case, with $f_o = 10 \, \text{cm} = 100 \, \text{mm}$ and $f_e = 10 \, \text{mm}$, the angular magnification calculates to $M = \frac{100}{10} = 10$.

Options B (5), C (100), and D (50) are incorrect because they do not accurately reflect the ratio of the focal lengths of the lenses used in the telescope.