What is Light ?
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Transcript of What is Light ?
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What is Light ?
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What causes the Aurora Borealis ?
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What is an Atom ?
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Basic Atom Structure
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Atoms also have shells
Hydrogen Carbon
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What happens when we give an electron more energy?
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Activity: Flame Test
Now we will test what happens when we add heat from a flame to different chemical compounds.
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Flame Test – Explanation
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Energy/heat is added to an electron
This causes the electron to move
from a lower electron shell to a
higher one
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Movement of electrons
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The electron loses the extra energy...
Eventually the electron loses this energy and both
heat and light are released as it
drops back down.
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Different elements produce different light when excited
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But where does the majority of light come from?
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The Sun
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What elements are being excited in the sun? Mostly HYDROGEN and HELIUM atoms
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Colours produced from hydrogen
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Colours produced from helium
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And when the colours combine....
They produce white/visible light
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Different Suns produce different colours
Different suns produce different colours based on the elements they contain and the amount of heat/energy they produce
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So what causes the Aurora Borealis ?