According to experimental data, the intensity of scattered sunlight in the atmosphere I is inverse proportional to the wavelength ? in the power n, I = A/(?ⁿ ). Consider the pseudo-experimental data shown in the Table where ? is presented in nanometers, and I is some normalized (but dimensional) variable.

350 nm 400 nm 450 nm 500 nm 550 nm 600 nm 650 nm 8.1-10 5 3-10 5 2.7-10 5 1.75-10-5 1.1-10 5 8.3-10 6 6.5-10 6