Question

very distant stars not visible to the eye are visible through telescope explain why​

Answer 1

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the aperture of islands is small and the light reaching the eye from very distant star is very small which is unable to excite the retina of our eye but the aperture of the telescope is much larger than that of the eye so it collects sufficient light from the distance star and forms a bright image of the star which is visible .

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Answer 2

Answer:

Because of the aperture through which light passes in a telescope is much bigger than the pupils of the eye.

Bigger the aperture more light passes through it and moreover in a telescope you even use an eyepiece to magnify the faint light so you can see very faint objects.

The bigger the primary mirrors or lens the more powerful and sensitive the instrument turns out to be.