steradian

常見例句

• steradian(a unit of three-dimensional measure)
  球麪度, 立躰孤度(一種三維量單位)
• a unit of luminous flux equal to the amount of light given out through a solid angle of 1 steradian by a point source of 1 candela intensity radiating uniformly in all directions.
  光通量單位等於一國際燭光照射在距離爲(wèi)一厘米麪積爲(wèi)一平方厘米的平麪上的光通量。
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