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| Numerical Relationship |
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| between |
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| �wavelength and
photon energy |
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| � | Inverse relationship:� Smaller
means more energetic |
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| � | c = speed of light = 3.00 108 m/s |
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| � | h = Planck�s constant = 6.63 10-34 joules x s |
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| � | Note:� Joule is a unit of
energy������� 1 Joule/second = 1 Watt |
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| � | Energy of a single photon of 0.5 m visible light? |
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| � | Seems very small, but this is roughly the energy it takes to
chemically |
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| modify a single molecule. |
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| � | Photons from a 100 W lightbulb�
(assuming all
100W goes into light?) |
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