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4.1 Vocabulary- telescopes
Teescopes, electromagnetic spectrum
9
Science
8th Grade
11/08/2011

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Term
Telecope
Definition
device that makes the distnt objects ppear to be closer.
Term
electromagnetic radiation
Definition
energy that can travel through space in the form of waves.
Term
visible light
Definition
electromagnetic radiation that can be seen with the unaided eye.
Term
wavelength
Definition
distance between the crest of one wave and the crest of the next wave.
Term
spectrum
Definition
light spreads out to make a range of different colors with different wavelengths
Term
optical telescope
Definition
telescope that uses lenses or mirrors to collect a focus of visable light.
Term
refracting telescope
Definition
uses convex lenses to gather a focus light.
Term
convex lense
Definition
piece of transparent glass, curved so the middle is thicker than the edges.
Term
reflecting telescope
Definition
uses a curved mirror
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