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.
光通量单国际烛光射在距离为面积为平方的平面上的光通量。
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.
光通量单国际烛光射在距离为面积为平方的平面上的光通量。
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