Combined consequence of ambient and diffused reflection
At this time the resulting intensity I will be the total sum of the intensities in case 8.3.2 and 8.3.3 we find that:
I = Ia Ka + Id Kd cos θ = Ia Ka + Id Kd ( N¯ .L¯)
Obtain Ka = Kd ; here Q both constant properties of material to that light is incident, for both sources there constant are similar.