An astronomical telescope in normal adjustment has a tube length of 93 cm and magnification (angular) of 30. If eye-piece is to be drawn out by 3 cm t
An astronomical telescope in normal adjustment has a tube length of 93 cm and magnification (angular) of 30. If eye-piece is to be drawn out by 3 cm to focus a near object, with the final image at infinity, find how far away is the object and the magnification (angular) is this case.
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