angle of incidence

例句：

1. 1. The light enters the roomat an angle of about 45degrees.
   光线以大约45度的角度进入房间。
2. 2. The angle of incidence is crucial fordetermining the wavelength of light.
   入射角对于确定光的波长至关重要。
3. 3. The scientist measuredthe angle of incidence to determine the refractive index of the material.
   科学家测量了入射角，以确定材料的折射率。