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FVidal
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Rayleigh scattering formula on a colloidal system
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In summary, the conversation discusses the Tyndall effect and the Rayleigh formula for single scattering. The speaker mentions their experience with multiple scattering in their masters thesis and refers to a paper on light-scattering measurements. They also mention the limitations and applications of the Rayleigh approximation and the availability of programs for calculating Mie scattering. The conversation ends with the speaker asking for clarification on what exactly needs to be characterized.
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Paul Colby
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Tyndall effect looks to be a multiple scatter effect where light scattered from more than one point in the suspension. The Rayleigh formula is for single scattering.
I actually did a masters thesis on multiple scattering.
"Light-scattering measurements from dense optical systems" P. C. Colby, L. M. Narducci, V. Bluemel, and J. Baer. Phys Rev A Vol. 12, Num 1, Oct 1972 pages 1530-1538.
I actually did a masters thesis on multiple scattering.
"Light-scattering measurements from dense optical systems" P. C. Colby, L. M. Narducci, V. Bluemel, and J. Baer. Phys Rev A Vol. 12, Num 1, Oct 1972 pages 1530-1538.
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hutchphd
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"Can I use" is a loaded question.
For example, are you interested in the geometry of the scattering, the wavelength dependence, or the forward transmittance or something else?
The Rayleigh approximation describes scattering from a single particle that is much smaller than the wavelength. It is applied whenever you can get away with it because it is relatively easy to use and understand. It will tell you why the sky is blue but not why the clouds are white! (This refers to a famous final exam question for classical electrodynamics)
So what is it you need to characterize? There are programs extant to calculate Mie Scattering but they are less inviting.
For example, are you interested in the geometry of the scattering, the wavelength dependence, or the forward transmittance or something else?
The Rayleigh approximation describes scattering from a single particle that is much smaller than the wavelength. It is applied whenever you can get away with it because it is relatively easy to use and understand. It will tell you why the sky is blue but not why the clouds are white! (This refers to a famous final exam question for classical electrodynamics)
So what is it you need to characterize? There are programs extant to calculate Mie Scattering but they are less inviting.
Related to Rayleigh scattering formula on a colloidal system
What is Rayleigh scattering formula on a colloidal system?
The Rayleigh scattering formula on a colloidal system is a mathematical equation that describes the scattering of light by small particles suspended in a medium. It takes into account the size and refractive index of the particles, as well as the wavelength of the incident light.
How does Rayleigh scattering on a colloidal system differ from Rayleigh scattering in a gas or liquid?
In a gas or liquid, Rayleigh scattering occurs due to the interaction of light with individual molecules. However, in a colloidal system, the particles are much larger and can interact with light as a whole, resulting in a different scattering pattern.
What factors affect the intensity of Rayleigh scattering on a colloidal system?
The intensity of Rayleigh scattering on a colloidal system is affected by the concentration and size of the particles, as well as the wavelength of the incident light. Additionally, the refractive index of the particles and the medium in which they are suspended can also play a role.
What is the significance of Rayleigh scattering on a colloidal system in scientific research?
Rayleigh scattering on a colloidal system is commonly used in scientific research to study the properties of colloidal particles, such as their size and concentration. It is also used in various techniques, such as dynamic light scattering, to analyze the behavior of colloidal systems.
Can the Rayleigh scattering formula on a colloidal system be applied to other types of particles?
While the Rayleigh scattering formula was originally developed for particles in a gas or liquid, it can also be applied to other types of particles, such as nanoparticles or microspheres. However, the assumptions made in the formula may need to be modified to account for the different properties of these particles.