How is Rayleigh scattering different from Mie scattering?
Rayleigh line refers to the unshifted central peak observed in the spectroscopic analysis of scattered light. Mie scattering refers primarily to the elastic scattering of light from atomic and molecular particles whose diameter is larger than about the wavelength of the incident light.
Which scattering occurs when particle diameter is equal to the wavelength?
Mie Scattering
Mie scattering takes place when there are essentially spherical particles present in the atmosphere with diameters approximately equal to the wavelength of radiation being considered.
What are the two types of scattering?
It generally includes two types of scattering which are elastic light and inelastic light scattering. Elastic light scattering includes Rayleigh scattering or Mie scattering while inelastic scattering includes Raman scattering, inelastic x-ray scattering, Compton scattering, and Brillouin scattering.
What is Rayleigh law of scattering?
(Also called Rayleigh scattering.) According to this law, first derived in 1871 by Lord Rayleigh using simple dimensional arguments, scattering in all directions by an object is inversely proportional to the fourth power of the wavelength of the illumination.
What particles cause Rayleigh scattering?
Rayleigh scattering scattering of light by particles that are less than 1/15 of the wavelength of the light. Atoms and ordinary molecules which have a diameter of less than one nanometer are included in Rayleigh scattering.
What is scattering explain about Rayleigh scattering?
Rayleigh scattering refers to the scattering of light off of the molecules of the air, and can be extended to scattering from particles up to about a tenth of the wavelength of the light. It is Rayleigh scattering off the molecules of the air which gives us the blue sky.
Which is stronger Mie scattering or Rayleigh scattering?
Mie Scattering. Mie scattering is much stronger than Rayleigh scattering and, therefore, a potential source of interference for this weaker light scattering process. There is a strong angular dependency of the scattered intensity especially for smaller particles which has to be considered for successful Mie imaging experiments.
When do interference effects develop in Rayleigh scattering?
At the intermediate x ≃ 1 of Mie scattering, interference effects develop through phase variations over the object’s surface. Rayleigh scattering applies to the case when the scattering particle is very small (x ≪ 1, with a particle size < 1 /10 wavelength) and the whole surface re-radiates with the same phase.
How is Mie used to measure flow velocities?
Mie scattering is often used to measure flow velocities applying Particle Image Velocimetry ( PIV ). Rayleigh scattering is the elastic scattering of light by particles much smaller than the wavelength of the light.
How is Mie scattering used in particle imaging?
There is a strong angular dependency of the scattered intensity especially for smaller particles which has to be considered for successful Mie imaging experiments. Mie scattering is often used to measure flow velocities applying Particle Image Velocimetry ( PIV ).