粒子

1. Origins, structure, and basic meaning

• Structure: 粒子 is read as りゅうし and is a noun for a particle, a very small discrete piece.
• Basic usage: It can identify fine particles visible in light or particles of different sizes being separated in an experiment.

2. Common pitfalls and similar expressions

• Particles being observed
  • 細かな粒子 describes the fine particles seen floating in the light. Example: 光の中に細かな粒子が浮かんで見えた。
• Objects of separation
  • In an experiment, particles of differing sizes can be treated as the objects being separated. Example: 実験では異なる大きさの粒子を分けた。