This paper introduces a new method of measuring the refractive index of parallel-sided transparent material with a Michelson interferometer-the minimum visibility of sodium light fringes.
介绍一种用迈克耳逊干涉仪测量平面平行透明物体折射率的新方法。
2
Solar halos are also caused by small, flat, six-sided, ice crystals that float down parallel to the ground.
太阳光环也是由微小、扁平、六面形的冰晶在同地面平行地飘落所引起的。
3
These stars form a parallelogram – a four-sided figure with its opposite sides equally long and parallel to one another.