How to Calculate Modified Version of Allard's Law?
Modified Version of Allard's Law calculator uses illuminance_of_eye_threshold = ((Intensity of light-Luminance of the Background of the Light*Area of the Light Source)*exp(-Extinction Coefficient *Visual Range))*Visual Range^-2 to calculate the Illuminance of the Eye at Threshold, The Modified Version of Allard's Law is the improvised formula relating the illuminance produced on a normal surface at a given distance from a point source of light, the intensity of the light and the degree of transparency of the atmosphere (assumed uniform). . Illuminance of the Eye at Threshold and is denoted by E_{th} symbol.
How to calculate Modified Version of Allard's Law using this online calculator? To use this online calculator for Modified Version of Allard's Law, enter Intensity of light (I), Luminance of the Background of the Light (L_{o}), Area of the Light Source (A), Extinction Coefficient (σ) and Visual Range (R) and hit the calculate button. Here is how the Modified Version of Allard's Law calculation can be explained with given input values -> 0 = ((1000-100*10)*exp(-0.016*150))*150^-2.