Abstract: The main component of protein glass is silicon dioxide,which contains a lot of nano-size bubbles of irregular distribution,and its size is much smaller than the wavelength of visible light.Protein glass is used as a scattering medium in order to improve the existing demonstration experiments of Rayleigh scattering,which can demonstrate the influence of medium thickness changes on the scattered light and transmitted light,and polarization characteristics of the scattered light are analyzed.The equipment is uncomplicated and simple to operate,and the phenomena are well observed.

Key words: Rayleigh scattering, demonstration experiment, protein glass, polarization