Luminous flux wiki
In photometry, illuminance is the total luminous flux incident on a surface, per unit area. It is a measure of how much the incident light illuminates the surface, ... ,The lumen (symbol: lm) is the SI derived unit of luminous flux, a measure of the total quantity of visible light emitted by a source per unit of time. Luminous flux ...
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Category:Units of luminous flux - Wikipedia
Luminous flux per unit solid angle per unit projected source area. The candela per square metre is sometimes called the nit. Illuminance, Ev, lux (= lumen per ... https://en.wikipedia.org Illuminance - Wikipedia
In photometry, illuminance is the total luminous flux incident on a surface, per unit area. It is a measure of how much the incident light illuminates the surface, ... https://en.wikipedia.org Lumen (unit) - Wikipedia
The lumen (symbol: lm) is the SI derived unit of luminous flux, a measure of the total quantity of visible light emitted by a source per unit of time. Luminous flux ... https://en.wikipedia.org Luminous flux - Wikipedia
In photometry, luminous flux or luminous power is the measure of the perceived power of light. It differs from radiant flux, the measure of the total power of ... https://en.wikipedia.org Luminous flux - Wikiwand
In photometry, luminous flux or luminous power is the measure of the perceived power of light. It differs from ... From Wikipedia, the free encyclopedia. Physical ... https://www.wikiwand.com Lux - Wikipedia
The lux (symbol: lx) is the SI derived unit of illuminance, measuring luminous flux per unit area. It is equal to one lumen per square metre. In photometry, this is ... https://en.wikipedia.org Talk:Luminous flux - Wikipedia
Untitled[edit]. The defintion given on this page is precisely the definition of lumen, the physical unit in which luminous flux is allegedly measured. --Smack 19:54 ... https://en.wikipedia.org 光通量- 維基百科，自由的百科全書 - Wikipedia
光通量（Luminous flux），符號是Φ，標準單位是流明（lumen，簡記為lm），是一種表示光功率的物理量，是表示光源整體亮度的指標。指每單位時間內由光源所 ... https://zh.wikipedia.org 照度- 維基百科，自由的百科全書 - Wikipedia
光通量, Luminous flux, Φv, 流明 · lm（lm= cd·sr）, 單位時間內由光源所發出或由被照物所吸收的總光能。 發光強度(光度), Luminous intensity, Iv, 坎德拉(燭光) ... https://zh.wikipedia.org 發光強度- 維基百科，自由的百科全書 - Wikipedia
發光強度（Luminous intensity），在光度學中簡稱光強或光度。用於表示光源給定方向上單位立體角內發光強弱程度的物理量，國際單位為燭光，符號：cd，以前 ... https://zh.wikipedia.org |