Luminous Intensity Calculator

An interesting online luminous intensity calculator to calculate the amount of light (brightness). This is called the luminous intensity or the light intensity. It is defined as a measure of the light emitted from a light source in a certain direction. Light Intensity measurement is given by, I = Luminous Flux (Φ) / Spatial Angle (Ω) and is measured by Photometry. The standard unit of measurement of the intensity of a light source is candela (cd).

Light Intensity Measurement

lm
ster
cd

An interesting online luminous intensity calculator to calculate the amount of light (brightness). This is called the luminous intensity or the light intensity. It is defined as a measure of the light emitted from a light source in a certain direction. Light Intensity measurement is given by, I = Luminous Flux (Φ) / Spatial Angle (Ω) and is measured by Photometry. The standard unit of measurement of the intensity of a light source is candela (cd).

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Formula:

I = Φ/Ω Where, I = Luminous Intensity Φ = Luminous Flux Ω = Spatial Angle

Example

Calculate the luminous intensity of a light source with luminous flux (Φ) as 15 lm and spatial angle (Ω) as 12 steradian.
Measurement of the intensity of a light source = 15 / 12
= 1.25 cd.


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