光度

例句：

1. 1. The sun's radiant light illuminates the night sky.
   太阳的光辉照亮了夜空。
2. 2. The camera has a high sensitivity, allowing it to capture fine details in low light conditions.
   相机具有较高的灵敏度，可以在低光照条件下捕捉到细微的细节。
3. 3. The scientist used a spectrometer to measure the spectral distribution of the light emitted by the stars.
   科学家使用光谱仪测量了恒星发出的光的光谱分布。