Light and Color .


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Fundamental Injector,2 miles around. Tevatron,4 miles around. Fermilab. What is light?. We consider light to be shading and brightnessIt\'s really electromagnetic radiation:Partly electric, somewhat magneticFlows in straight line (transmits). Where does light originate from?. The Sun and starsBut how would they make light?.
Transcripts
Slide 1

Light and Color Susan Burke T.J. Sarlina

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Fermilab Tevatron, 4 miles around Main Injector, 2 miles around

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What is light? We consider light to be shading and splendor It\'s really electromagnetic radiation: Partly electric, mostly attractive Flows in straight line (emanates)

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Where does light originate from? The Sun and stars But how would they make light?

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It All Starts With Atoms A core encompassed by electrons that circle. Like the planets in the nearby planetary group, electrons remain in a similar circle, unless…

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Electrons Change Orbits Electrons get kicked into an alternate circle This doesn\'t occur regularly in universes, however it does in particles If you add vitality to a molecule (warm it up), the electrons will bounce to greater circles. At the point when molecule cools, electrons bounce back to unique circles. As they bounce back, they transmit light, a type of vitality

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Color of light Each electron that hops back radiates one photon of light The shade of this light relies on upon how huge the hop was between circles The greater the hop, the higher the vitality. The vitality decides shading; a blue photon has more vitality than a red

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With every one of the hues together, you get white light!

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Light as a molecule A photon resembles a molecule, yet it has no mass Think of a photon as a grain of sand. We see such a large number of photons in the meantime it resembles seeing all the sand on a shoreline or a ridge. We don\'t see the single grains

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Light as a wave But now and again light acts like a wave A wave has a wavelength, a speed and a recurrence. The vitality goes up as recurrence goes up Color relies on upon recurrence Wavelength gets shorter as recurrence goes up

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Wave conduct and polarization Light waves can be sifted with unique gear like shades. More arrangements of channels can totally piece light in the correct blend.

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Speed of Light goes at 300,000,000 meters/second or 186,000 miles/second All light voyages same speed (in vacuum) It takes 8 minutes for a light wave (or a photon) to set out from the sun to the earth. Separation is 93,000,000 miles.

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Does light twist? We see the moon since it mirrors the daylight It takes 1 second for light reflected off the moon to achieve the earth. Amid this lunar obscuration the moon looks red since daylight twists around the earth and blue is sifted through. Add up to Lunar Eclipse – February 20, 2008 Picture kindness of The Daily Herald

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Light and matter When light hits something (air, glass, a green divider, a dark dress), it might be: Transmitted (if the thing is straightforward) Reflected or scattered (mirror or raindrops) Absorbed (off a dark velvet dress) Some mix of the three

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The waves can go through the question The waves can be reflected off the protest. The waves can be scattered off the question. The waves can be consumed by the question. The waves can be refracted through the question.

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Light transmission and shading Transparent materials transmit light, similar to windows. Diverse frequencies have distinctive speeds in straightforward materials – that causes a crystal to isolate the hues. Hued glass or plastic just transmits the shading that it will be; it retains alternate hues.

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Reflection and shading Remember, white light contains all hues (a crystal or raindrop isolates them so we can see a rainbow) Why does a green divider look green in the daylight? A green divider reflects just green light; it assimilates the various hues. Why does it look changed when it\'s in the shade? Oblivious, it\'s dark. No light reflects off it.

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Absorption and shading Why is a dark auto more sultry than a white auto in the late spring? Keep in mind light is vitality. Warmth is another type of vitality. A white auto mirrors all wavelengths of light. A dark auto retains all wavelengths of light, engrossing the vitality and swinging it to warm.

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Using Light to Study the Stars Astronomers gather vitality from the stars with a telescope Visible light Infrared light Radio waves, and so forth. Every molecule has an exceptional example of light frequencies like a unique mark The unique finger impression of frequencies will be moved if the star is moving without end or toward us (like the sound of a cargo prepare) The temperature of the Star can be resolved from the shade of the star

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Two photos of the Ring Nebula. Unmistakable light Infrared light

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Visit Fermilab www.fnal.gov Buffalo seeing Bicycling Walking Roller blading Canoeing Fishing

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