(Solution) - A simple telescope has an objective with a focal length -(2025 Original AI-Free Solution)

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Academic Level: Undergrad. (yrs 3-4)

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A simple telescope has an objective with a focal length of 100 cm and an eyepiece of focal length 5 cm. It is used to look at the moon, which subtends an angle of about 0.009 rad.
(a) What is the diameter of the image formed by the objective?
(b) What angle is subtended by the final image at infinity?
(c) What is the magnifying power of the telescope?