Slide 1

Universe of Light

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?Lightis radiant energy, usually referring toelectromagnetic radiationthat isvisibleto thehuman eye, and is responsible for the sense ofsight.Visible light is usually defined as having awavelengthin the range of 400nanometres, or 400109m, to 700nanometres between theinfrared, with longer wavelengths and theultraviolet, with shorter wavelengths..( )

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(Infrared vision)

Infrared Vision

(Ultraviolet Vision)

(Scorpion): (Ultraviolet vision)

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EMS

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Observatory

Observatory ? UV ray - UV ray UV ray UV ray

EM Spectrum

Newton & prism

Absorption ,

Mr. Joseph Von Fraunhofer

Absorption

Gustav Kirchhoffs Law

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Gustav Kirchhoffs Law

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!! Spectral lines ( ??.., ..)

(wave-particle duality)

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