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Unit 16: Astronomy And Space Science B2

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Unit 16-Astronomy and Space Science B2
Electromagnetic Spectrum Telescopes
A telescope uses a curved lens or mirror to collect light from distant objects and to focus that light to an image. A bigger objective lens or mirror collects more light therefore it creates a brighter and much sharper image. The focused image, which is formed by the objective lens of a telescope, is magnified by a smaller second lens called an eyepiece. As visual observers, we look into the eyepiece to see the bright magnified image from the objective. But an eyepiece used with a small lens or mirror simply magnifies a dim and fuzzy image.
Reflecting Telescopes
When light hits a surface that it can't travel through, it bounces back. If the surface is smooth, like

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