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u |
Light
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l |
A form
of Electromagnetic Energy
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l |
Two
Complementary Descriptions
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u |
Particle
- Photon is unit of light.
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u |
Wave -
like a wave in ocean
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Electromagnetic
spectrum
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gamma -
10-14 - 10-12
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x-rays -
-- ~10-9
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Ultraviolet
-- ~760 nm (>10-7)
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° Visual 760-380 nm
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Infrared
<10-6 - ~10-3
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radar -- 10-1
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radio
bands > over a mile
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