3) Scattering theory. Consider the transmission coefficient of the 1-D problem shown below: E>Vo E R? T? 0 Given that the problem is confined to one dimension, we find just two angles that belongs to the scattering cross-section: When 0 = 7, it corresponds to the backward scattering cross-section, whereas when 0 = 0, it corresponds to the forward scattering cross-section. Approximate the forward scattering cross-section using the first Born approximation