How to Calculate Illumination by Lambert Cosine Law?
Illumination by Lambert Cosine Law calculator uses Illumination Intensity = (Luminous Intensity*cos(Illumination Angle))/(Length of Illumination^2) to calculate the Illumination Intensity, Illumination by Lambert Cosine Law is a fundamental principle in photometry and lighting that describes the relationship between the illumination of a surface and the angle of incidence of light. This law essentially tells us that surfaces appear brighter when they are directly illuminated (θ = 0°) and become progressively darker as the angle of incidence increases (θ approaches 90°). This is because as the angle increases, the light is spread over a larger area, resulting in lower intensity at each point. Illumination Intensity is denoted by E_{v} symbol.
How to calculate Illumination by Lambert Cosine Law using this online calculator? To use this online calculator for Illumination by Lambert Cosine Law, enter Luminous Intensity (I_{v}), Illumination Angle (θ) & Length of Illumination (L) and hit the calculate button. Here is how the Illumination by Lambert Cosine Law calculation can be explained with given input values -> 3.641609 = (4.62*cos(1.1344640137961))/(2.1^2).