An astronomical telescope has an objective lens with focal length 800 mm and produces an angular magnification of 40 when used with only its eyepiece. What is the distance between the objective lens and the eyepiece when this telescope is in use?

1.800 mm
2.820 mm
3.780 mm
4.One cannot find this length until one knows the focal length of the eyepiece.


2

Physics & Space Science

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