uLight
lA
form of Electromagnetic Energy
lTwo
Complementary Descriptions
uParticle
- Photon is unit of light.
uWave
- like a wave in ocean
uElectromagnetic
spectrum
ugamma - 10-14 - 10-12
ux-rays - -- ~10-9
uUltraviolet -- ~760 nm
(>10-7)
v° Visual 760-380 nm
uInfrared <10-6 -
~10-3
uradar -- 10-1
uradio bands > over a
mile