1.

As astronomical telescope and a Galilean telescope use identical objective lenses. They have the same magnification, when both are in normal adjustment. The eyepeice of the astronomical telescope has a focal length f.

Answer»

The TUBE lengths of the TWO TELESCOPES differ by `f`
The tube lengths of the two telescope differ by `2f`
The Galilean telescope has SHORTER tube length.
The Galilean telescope has longer tube length.

Answer :B::C


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