蛍光

1. Origins, structure, and basic meaning

• Structure: 蛍光 is read as けいこう and is a noun for fluorescence, the characteristic light emitted by a substance after receiving energy.
• Basic usage: It forms compounds such as 蛍光塗料 and also names the observed phenomenon in 蛍光を観察する.

2. Common pitfalls and similar expressions

• Scope of the phenomenon
  • It specifically names fluorescence, so it is not interchangeable with general words for light or brightness.
• Compound formation
  • Attach it directly in 蛍光塗料; when naming the phenomenon itself, use it as a noun with patterns such as 蛍光を観察する.