refractiveness

例句：

1. 1. The lens in the microscope is designed to measure the refractiveness of objects.
   显微镜中的透镜设计用来测量物体的折射率。
2. 2.The scientist used a prism to observe the rainbow's colors and measure its refractiveness.
   科学家使用棱镜来观察彩虹的颜色并测量其折射率。
3. 3. The physicist calculated the refractiveness of the medium using the law of reflection.
   物理学家利用反射定律计算了介质的折射率。