Question

Parallel beam radiation is passing through a layer 100 m in thickness, containing a gas with an average density of 0.1 kgm^-3. The angle between the beam and the layer is 30^o. Calculate the optical depth, transmissivity, and absorptivity of the layer at wavelengths l₁, l₂, l₃, for which the absorption coefficients are 10^-3, 10^-1, and 1 m² kg^-1, respectively.

Answer 1