Transcription of Dynamic Light Scattering Training
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Dynamic Light Scattering Training Achieving reliable nano particle sizing Dr Ryan Shaw (Sales and Application Support) Light Scattering Theory Aims of this 1 Understand what Light Scattering is 2 Understand what Rayleigh Scattering is 3 Understand what Mie Scattering is What is Light Scattering ? Light Scattering is a consequence of the interaction of Light with the electric field of a small particle or molecule An incident photon induces an oscillating dipole in the electron cloud As the dipole changes, energy is radiated in all directions This radiated energy is called scattered Light Rayleigh Theory Rayleigh theory is applicable for small particles and molecules whose diameters are less than 1/10th of the laser wavelength ( For the He-Ne laser ( = 633nm))
www.atascientific.com.au Mie Theory › Mie theory is an exact description of how spherical particles of all sizes and optical properties scatter light › When particles become larger than /10, the scattering changes from being isotropic to a distortion in the
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