Materials scatter light at wavelengths at which they do not absorb
If we consider the visible spectrum to be 350-850 nm then small particles (< 1/10 _) scatter rather than absorb light
For small particles (molecular up to sub micron) the Rayleigh scatter intensity at 0o and 180o are about the same
For larger particles (i.e. size from 1/4 to tens of wavelengths) larger amounts of scatter occur in the forward not the side scatter direction - this is called Mie Scatter (after Gustav Mie) - this is how we come up with forward scatter be related to size
This slide focuses on the properties of light scattering. This slide is used to show that light is scattered when exposed to small particles around 350-850 nm..
