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Electromagnetic radiation, Optical Properties, Optical devices, Density of…
Electromagnetic radiation
Electrical field
change
magnetic field
change
Electromagnetic radiation
Visible light
Radio waves
Microwaves
Infrared(IR)
Ultraviolet radiation
X-rays
Gamma rays
Speed of light
photon
Particle
Wave
Optical Properties
Light interactions with solid
reflected
absorbed
scattered
transmitted
metal
absorption
electron transition
reflectivity
0.9~0.95
Refraction
transmitted light vs electron cloud
light slower in material
nonmetal
color
transmitted light
re-emitted light from electron transitions
reflectivity
Light absorption
Beer's law
polymer
Scattering of light
semiconductor
Selected light absorption
Optical devices
laser
Light
Amplification by
Stimulated
Emission of
Radiation
Pump electron to excited states
Luminescence
Photoluminescence
adjust color
dope metal cation
reemission of light
10^-8
longer
phosphorescence
shorter
fluorescence
light transmission
transparent
opaque
translucent
Cathodoluminescence
cathode-ray tube device
CD vs DVD
CD
red light
DVD
blue light
higher storage density
Density of States(DOS)
crystalline solid
many energy bands
forbidden band
no states
