•Rayleigh Scattering – scattering by particles whose longest dimension is < 5 % to 10 % of λ with no change in observed frequency
•
•                   8 π4 a2
•            Is = ------------ (1 + cos2 θ) Io
•                      λ4 r2
•
polarizability
scattering
intensity
wavelength
angle between
incident beam
& scattered
beam
distance from
scattering center
to detector
incident beam
intensity
Notice the fourth power dependence on wavelength meaning
short wavelengths are scattered more efficiently Þ sky is blue