https://learn.microsoft.com/id-id/dotnet/api/system.windows.media.media3d.pointlightbase.quadraticattenuation?view=netframework-4.8.1&viewFallbackFrom=windowsdesktop-10.0
PointLightBase.QuadraticAttenuation Property (System.Windows.Media.Media3D) | Microsoft Learn
Gets or sets a value that specifies the diminution of the light's effect over distance, calculated by a quadratic operation.
property systemwindows mediamicrosoftlearn