Suppose an astronomical telescope is being designed to have an angular magnifica

Question

Suppose an astronomical telescope is being designed to have an angular magnification of 31.6. If the focal length of the objective lens being used is 84.5 cm, find the required focal length of the eyepiece and the distance between the two lenses for a relaxed eye. Hint: For a relaxed eye, the image formed by the objective lens is at the focal point of the eyepiece.
(a) Find the required focal length of the eyepiece.
_______ cm

(b) Find the distance between the two lenses for a relaxed eye.
_______ cm

Explanation / Answer

M=fo/fc==>31.6=98/fc,

A) fc=98/31.63.1 cm

B) fo+fc=98+3.1=101.1 cm

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