Particle size refers to the physical dimensions of solid particles, which can be expressed in terms of diameter or volume. It is a critical parameter in various fields, including materials science, pharmaceuticals, environmental science, and engineering, as it can influence the properties and behavior of materials and substances. Particle size can be measured in several ways: 1. **Diameter**: Often expressed in micrometers (µm), nanometers (nm), or millimeters (mm).
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