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luz proyección / difusión / reflexión Thursday, October 28, 2010
Transcript
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luzproyección / difusión / reflexión

Thursday, October 28, 2010

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Llamamos fuentes de luz a aquellas que la proyectan.

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Nuestra principal fuente de luz es, evidentemente, el sol

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y a grandes rasgos las fuentes de luz pueden dividirse en naturales y artificiales

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Las fuentes de luz naturales pueden venir del cielo,

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aurora boreal en alaska

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o de la tierra,

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lava volcánica

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o del agua.

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krill antártico

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Existen las fuentes de luz de tipo químico,

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las basadas en la combustión,

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o en la energía eléctrica.

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Dentro de la energía eléctrica,

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están las estimuladas por electrones,

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las incandescentes,

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halógenas

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las electroluminiscentes,

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cable electroluminiscente

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LED

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y de descarga de gas.

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También existen otros fenómenos o artefactos lumínicos

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como el láser,

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la sonoluminiscencia,

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o las lámparas de bronceado

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difusión

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la difusión es la desviación de la luz

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reflexión

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Al incidir la luz en un cuerpo, la materia de la que está constituido retiene unos instantes su energía y a continuación la reemite en todas las direcciones.

Este fenómeno es denominado reflexión.

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Thursday, October 28, 2010