When the light source radiation is uniform, the light intensity is I=F/Ω, Ω is the solid Angle, the unit is sphericity (sr), F is the luminous flux, the unit is lumen, for the point light source by I=F/4π. Brightness is the brightness of the luminous surface, refers to the ...
百度试题 结果1 题目The unit of illuminance is: 发光强度的单位是 A. lumen 流明 B. candela 烛光 C. lux 勒克斯 D. decibel 分贝 相关知识点: 试题来源: 解析 B 反馈 收藏
But now that you couldn’t use a brightness comparison in bulbs using the old school method of watts. That’s where lumens come in. A lumen is the unit of measurement for the amount of light generated by a light source. The phrase lumen means light, which means it measures the amount ...
The lumen of the acinus is *** all and narrow, but that of the alveolus is large and distended . 单腺泡腔小而狭窄，但肺泡的腔却大而膨满。An older unit, the lumen per square foot, or foot-candle, has bee obsolete . 一种较老的单位是每平方米英尺的流明数，即英寸...
A lumen is a measure of the rate of emission of light energy. 流明是光能放射率的量度单位. 来自辞典例句 11. Tumors that arise from vessels extend outward from the lumen towards soft tissue. 起源于血管的肿瘤从腔内向外延伸至软组织. 来自期刊摘选 12. Lumen : The unit for measuring luminous ...
Here is a glomerulus in which the capillary loo are markedly pink and thickened such that capillary lumen are hard to see. 图示肾小球,其中的毛细血管袢中呈明显的粉红色、管腔增厚,以至于毛细血管腔难以看见。 yiqi.ebioe.com 9. The spare saw blades can be taken out of the L-shaped lumen by...
lumen的意思是官腔。双语例句：1.A lumen is a measure of the rate of emission of light energy.流明是光能放射率的量度单位。2.An older unit, the lumen per square foot, or foot-candle, has become obsolete.一种较老的单位是每平方米英尺的流明数，即英寸烛光，这种单位已经废除。3....
13. The lumen of the acinus is small and narrow, but that of the valveolus is large and distended. 单腺泡腔小而狭窄,但小泡状腺的腔却大而膨满。 14. lumen的意思 14. RESULTS: Dysfunction of the suction lumen occurred in 19 of40 patients (48%). ...
When choosing lighting fixtures, the lumen is often mentioned, but its importance may not be well-known to everyone. The lumen is the international unit for measuring the total amount of light emitted by a light source and represents the brightness of the light emitted by the fixture. Understan...
a unit of lum... lumen noun Synonyms for lumen nouna 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