Question

why is the aperture of the objective preferred to be large ?

Answer 1

Hey mate ^_^

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Answer:
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The aperture of the objective is preferred to be large for two reasons:-

1) Larger the aperture, larger the amount of light it can collect.

2) Resolving power of telescope is directly proportional to its aperture, so it is kept larger. 

#Be Brainly❤️

Answer 2

That's usually true because the function of the objective is to collect a lot of light and form an image, and the function of the eyepiece is to allow the eye to inspect a portion of that image (the higher the magnification, the smaller the portion of the overall image that is inspected).