photometry

例句：

1. 1.The scientist used a photometer to measure the intensity of light.
   科学家使用光度计来测量光线的强度。
2. 2. Photometry is an important tool in analyzing the color of objects.
   光度测量是分析物体颜色的重要工具。
3. 3.The researcher conducted photometry experiments to study the effect of light on plants.
   研究者进行了光度实验，以研究光线对植物的影响。