Telescope Equations: Magnification
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A Galilean telescope measures 9 cm from the objective to the eye-piece. The focal length of the objective is 15 cm. Its magnifying power is A. $2.5$ B. $\\dfrac{2}{5}$ C. $\\dfrac{5}{3}$ D. $\\dfrac{3}{5}$
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Focal length, explained by RP Photonics Encyclopedia; focal distance, dioptric power, curved mirror, lens equation, microscope, photographic objective, focus, beam radius
Telescope Equations: Minimum Magnification
