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Questions and Answers
What is the main cause of the blue color of the sky?
What is the main cause of the blue color of the sky?
Scattered sunlight
What does Mie theory explain when particle size is greater than 10 times the wavelength of light?
What does Mie theory explain when particle size is greater than 10 times the wavelength of light?
Scattering changes with distortion in the forward scattering direction.
What information can be obtained from the intensity of the scattering pattern at various angles in light scattering?
What information can be obtained from the intensity of the scattering pattern at various angles in light scattering?
Particle size information
What happens to light scattering intensity when particle size is less than 80 nm?
What happens to light scattering intensity when particle size is less than 80 nm?
What is used to identify a molecule or particle in solution using light scattering?
What is used to identify a molecule or particle in solution using light scattering?
What does Rayleigh scattering intensity depend on?
What does Rayleigh scattering intensity depend on?
What is the main consequence of the interaction between the electric field of light and a small particle or molecule?
What is the main consequence of the interaction between the electric field of light and a small particle or molecule?
What are the two types of interactions between light and molecules (small particles) in light scattering?
What are the two types of interactions between light and molecules (small particles) in light scattering?
What kind of interaction is Rayleigh scattering?
What kind of interaction is Rayleigh scattering?
What is radiated in all directions during light scattering?
What is radiated in all directions during light scattering?
For what type of particles is Rayleigh theory applicable?
For what type of particles is Rayleigh theory applicable?
What is the approximate size limit for particles on which Rayleigh theory may be used for a He-Ne laser (λ = 633nm)?
What is the approximate size limit for particles on which Rayleigh theory may be used for a He-Ne laser (λ = 633nm)?
What is the mechanism behind Dynamic Light Scattering (DLS) measurement?
What is the mechanism behind Dynamic Light Scattering (DLS) measurement?
How is the velocity of Brownian motion determined in DLS?
How is the velocity of Brownian motion determined in DLS?
What happens to the scattering intensity over a short timescale in DLS?
What happens to the scattering intensity over a short timescale in DLS?
How does the correlation persist in DLS for large particles?
How does the correlation persist in DLS for large particles?
What is the primary size distribution obtained from DLS measurement?
What is the primary size distribution obtained from DLS measurement?
What role does a correlator play in DLS analysis?
What role does a correlator play in DLS analysis?
What is the relationship between the hydrodynamic diameter (dH) and the translational diffusion coefficient (D) in Dynamic Light Scattering (DLS)?
What is the relationship between the hydrodynamic diameter (dH) and the translational diffusion coefficient (D) in Dynamic Light Scattering (DLS)?
How does the surface structure of a particle affect its hydrodynamic diameter (dH)?
How does the surface structure of a particle affect its hydrodynamic diameter (dH)?
Explain the impact of the ionic concentration of the medium on the hydrodynamic diameter (dH) of a particle.
Explain the impact of the ionic concentration of the medium on the hydrodynamic diameter (dH) of a particle.
How is the hydrodynamic diameter (dH) of non-spherical particles calculated in Dynamic Light Scattering (DLS)?
How is the hydrodynamic diameter (dH) of non-spherical particles calculated in Dynamic Light Scattering (DLS)?
What factors determine the hydrodynamic diameter (dH) of a particle in Brownian motion?
What factors determine the hydrodynamic diameter (dH) of a particle in Brownian motion?
How does the translational diffusion coefficient (D) relate to the hydrodynamic diameter (dH) in Dynamic Light Scattering (DLS)?
How does the translational diffusion coefficient (D) relate to the hydrodynamic diameter (dH) in Dynamic Light Scattering (DLS)?
What type of distribution is rarely used due to the risk of huge errors?
What type of distribution is rarely used due to the risk of huge errors?
In low concentration samples, what is the relationship between turbidity and concentration?
In low concentration samples, what is the relationship between turbidity and concentration?
What type of plot should be used for reporting the size of each peak in the distribution?
What type of plot should be used for reporting the size of each peak in the distribution?
Why may determining the correct particle concentration require several measurements at different concentrations?
Why may determining the correct particle concentration require several measurements at different concentrations?
What type of data should be used for reporting the relative amounts of each peak in the distribution?
What type of data should be used for reporting the relative amounts of each peak in the distribution?
What is the main drawback of using an Electron Microscope (SEM and TEM) for observing nanoparticles?
What is the main drawback of using an Electron Microscope (SEM and TEM) for observing nanoparticles?
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