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.
通量单位等于一国离为一厘米面积为一平方厘米的平面上的通量。
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.
通量单位等于一国离为一厘米面积为一平方厘米的平面上的通量。
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