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SPACE EXPLORATION
Lesson 2 - Page 4

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REFLECTING TELESCOPES

Sir Isaac Newton was searching for a way to reduce the length of a telescope and still enlarge an image. He used a curved mirror to reflect and focus the light inside the tube, and invented the reflecting telescope. Unfortunately the image has a rainbow effect on the outside of the image, that requires other lenses to correct. Ultraviolet and infrared wavelengths can be used with reflecting telescopes.

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