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asdf1
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What is the purpose of the reflecting and limiting sphere in diffraction?
This may not be crystal clear, but maybe with what you already know it will get you going in the right direction. Obviously, you need to have a basic understanding of reciprocal space for this to make any sense at all.asdf1 said:What is the purpose of the reflecting and limiting sphere in diffraction?
The reflecting and limiting sphere in diffraction is used to accurately measure the scattering properties of a sample. It is specifically designed to control the direction and intensity of the scattered light, allowing for precise measurements to be taken.
The sphere is coated with a highly reflective material, such as barium sulfate, and has a small opening for the light to enter. The light is then scattered within the sphere and measured by a detector, providing information about the sample's scattering properties.
One limitation is that the size of the sphere limits the size of the sample that can be measured. Another limitation is that the sphere only measures forward scattering, so information about the sample's backscattering properties cannot be obtained.
This type of sphere is commonly used to measure the scattering properties of particles suspended in a liquid, such as in pharmaceuticals or environmental samples. It can also be used to measure the scattering of solid materials, such as powders or thin films.
Yes, there are other techniques that can be used to measure scattering properties, such as small angle X-ray scattering or dynamic light scattering. However, the reflecting and limiting sphere is a widely used and reliable method for measuring scattering in a controlled environment.