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Made up of all the lengths of electromagnetic radiation. |
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An instrument that collects electromagnetic radiatioon from the sky and concentrates it for better observation. |
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The bigger the objective lens, what hapens? |
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-Without a telescope how many stars can you see? -With a telescope how many stars can you see? |
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-6,000 stars (at night) -millions of stars |
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What is an objective lens? |
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a lens that collects light and forms an image at the back of the telescope. |
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telescopes that use a set of lens to gather and focus light. |
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telescopes that use curved mirrors to gather and focus light. |
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