How to Calculate Lambert's Cosine Law?
Lambert's Cosine Law calculator uses Illuminance at Angle of Incidence = Illumination Intensity*cos(Incident Angle) to calculate the Illuminance at Angle of Incidence, The Lambert's Cosine Law formula is defined as Lambert’s cosine law states that the radiant intensity from the ideal diffusely reflecting surface and cosine of the angle θ between the direction of incident light and surface normal are directly proportional. Illuminance at Angle of Incidence is denoted by E_{θ} symbol.
How to calculate Lambert's Cosine Law using this online calculator? To use this online calculator for Lambert's Cosine Law, enter Illumination Intensity (E_{v}) & Incident Angle (θ_{i}) and hit the calculate button. Here is how the Lambert's Cosine Law calculation can be explained with given input values -> 0.66323 = 0.8*cos(0.59341194567796).