下列那一比色計之波長選擇解析能力（resolution）最好？單選題(1 分) A.比色計的spectral band width為60 nm B.比色計的spectral band width為20 nm C.比色計的spectral band width為2 nm D.比色計的迷光（Stray light）為3%

Analysis of Options

1. Resolution and Spectral Band Width: The resolution of a spectrophotometer is inversely related to the spectral band width. A smaller spectral band width allows for better resolution, meaning the ability to distinguish closely spaced wavelengths.

2. Evaluating Each Option:

   • A. Spectral band width = 60 nm (lower resolution)
   • B. Spectral band width = 20 nm (better resolution than A)
   • C. Spectral band width = 2 nm (best resolution)
   • D. Stray light = 3% (affects measurement but not spectral resolution)

Conclusion

Based on the analysis, the option with the smallest spectral band width represents the best resolution.

Final Answer

C. 比色計的spectral band width為2 nm