Light Reflection and Particle Size

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Discussion Overview

The discussion revolves around the principles of light reflection and scattering as they relate to particle size determination in particle counters. Participants explore various detection methods and the underlying theories involved, particularly focusing on optical methods.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant mentions that optical methods typically use Mie scattering or its extensions to model particle sizes.
  • Another participant notes that additional information, such as the number of particles, may be necessary for accurate measurements.
  • A participant seeks clarification on the scattering behavior of large particles, stating that they scatter light through smaller angles and produce larger signals.
  • There is a request for more details regarding the principles involved in measuring a single particle's size.

Areas of Agreement / Disagreement

The discussion does not reach a consensus, as participants express varying levels of understanding and seek further clarification on specific aspects of the topic.

Contextual Notes

Participants indicate that the topic is new for some, which may affect the depth of the discussion. There is also a lack of detailed assumptions or definitions regarding the principles of light scattering and particle size measurement.

JoJoQuinoa
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I'm studying particle counters and one of the detection methods uses reflected light to determine the sizes of the particles. What principle does it base on?

Thanks!
 
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There are many. One usually needs some other info like number of particles for instance. Your description is a little terse to specify
 
@hutchphd My apologies. This is from the slide I'm reading: "large particles scatter light through smaller angles and larger signals." The topic is fairly new for me so I don't know what details to consider yet. How about a single particle?
 
JoJoQuinoa said:
I'm studying particle counters and one of the detection methods uses reflected light to determine the sizes of the particles. What principle does it base on?

Thanks!

Optical methods typically use Mie scattering (or extensions thereof) to model particle sizes.

https://link.springer.com/book/10.1007/978-1-4757-1983-3
 
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