## An astronomical telescope has its two lenses spaced 81.1 cm apart. If the objective lens has a focal length of 78.0 cm , what is the magnifi

Question

An astronomical telescope has its two lenses spaced 81.1 cm apart. If the objective lens has a focal length of 78.0 cm , what is the magnification of this telescope? Assume a relaxed eye. Follow the sign conventions.

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3 months 2021-08-12T08:03:37+00:00 1 Answers 5 views 0

The magnification is

Explanation:

From the question we are told that

The distance between the lenses is

The focal length of the objective lens

Generally the  length of the telescope that satisfies the condition for a relaxed eye can be mathematically represented as

Where is focal length of the eyepiece

Making the subject the of the formula above

Now substituting value

Generally magnification can be mathematically represented as

This negative sign is a reminder that all real image are always inverted