6. If you wanted to develop a telescope, what kind of lenses would you use for the objective lens (the lens that collects the light) and the

Question

6. If you wanted to develop a telescope, what kind of lenses would you use for the objective lens (the lens that collects the light) and the eyepiece? Explain your reasoning. Draw a picture with ray tracing of your setup.

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Thái Dương 5 months 2021-08-09T17:08:04+00:00 1 Answers 18 views 0

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  1. haidang
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    2021-08-09T17:09:14+00:00
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    Answer:

    objetive: a converging lens for large diameter lenses

    eyepiece you must select a lens with a small focal length and the diameter is not important

    The selected lenses should decrease chromatic aberration.

    Explanation:

    A telescope is an instrument that collects light from very distant objects, therefore very weak.

    Therefore you should select a converging lens for large diameter lenses, to collect magnanimous light and with a large focal length.

    For the eyepiece you must select a lens with a small focal length and the diameter is not important

    the telescope magnification is

                     m = f_objective / F_ocular

    The selected lenses should decrease chromatic aberration.

    In general, these lenses are heavy, so refractory telescopes were imposed, so it uses a concave mirror instead of an objective lens.

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