Question

An astronomical telescope uses two lenses of power 10D and 1D.
(a). Which of the two lenses is the objective and which one is the eyepiece?

Answer 1

Answer:

the 10D lense is objective and the 1D lense is eyepiece.

Answer 2

10 D as eye piece and 1 D as objective lens.

Explanation:

• It is given that, An astronomical telescope uses two lenses of power 10 D and 1 D.
• To make an Astronomical Telescope, we must use a convex lens of large focal length or small power as objective lens.

• It must also consists of a convex lens of small focal length or large power as eye piece.
• Here, the lens of power 10 D must be used as eye piece and the lens of power 1 D must be used as objective lens.

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Astronomical Telescope

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