Viewed from Earth, the Moon subtends an angle of $0.5^{\circ}$ in the sky. How large an image of the Moon will be formed by the $3.6-\mathrm{m}-$ diameter, 8.5 -m-focal-length mirror of the Canada-FranceHawaii Telescope?
Added by Patrick N.
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5 and the focal length of the mirror is 8.5 m, we can use the formula for angular magnification M = FO / FE, where FO is the focal length of the objective and FE is the focal length of the eyepiece. Show more…
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