Question
An old refracting telescope placed in a museum as an exhibit is $55 \mathrm{~cm}$ long and has magnification of $45 .$ What are the focal lengths of its objective and eyepiece lenses?
Step 1
This can be written as: \[D = F_o + F_e \tag{1}\] Given that D = 55 cm, we have: \[55 = F_o + F_e \tag{2}\] Show more…
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