E3N1_Oct11[1] - L I G H T Radiation is anything that...

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Unformatted text preview: L I G H T Radiation is anything that spreads out from a source. - Light obeys the inverse square law so it qualifies! Light : What is it? Radiation is anything that spreads out from a source. - Light obeys the inverse square law Light is a form of electromagnetic radiation. Newton discovered that sunlight is composed of all the colors of a rainbow. This is called a visible spectrum . Visible Light is a small part of the electromagnetic spectrum . Light : What is it? Radiation is anything that spreads out from a source. - Light obeys the inverse square law Light is a form of electromagnetic radiation. Newton discovered that sunlight is composed of all the colors of a rainbow. This is called a visible spectrum . Visible Light is a small part of the electromagnetic spectrum . Light : What is it? Light : How can we use it? Light is nearly the only source of information we have about the universe outside the Solar System We have to learn all we can about its properties Light carries energy - Save energy by turning off your lights...
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This note was uploaded on 11/27/2011 for the course AST 301 taught by Professor Harvey during the Spring '07 term at University of Texas at Austin.

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E3N1_Oct11[1] - L I G H T Radiation is anything that...

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