3. Can we use mirror in a telescope? What kind of mirror? How this will help to see distant objects?
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3. Can we use mirror in a telescope? What kind of mirror? How this will help to see distant objects?
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Mirrors can be constructed much larger than lenses and can, thus, gather large amounts of light, as needed to view distant galaxies, for example. Large and relatively flat mirrors have very long focal lengths, so that great angular magnification is possible.
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