If τ ≠ 0 dispersion must be present. An advantage of this approach is that it makes no a priori assumptions on the nature of the light curve apart from the inevitable hypothesis of simultaneity of emission of photons of all energies at the source.
If τ ≠ 0 dispersion must be present. An advantage of this approach is that it makes no a priori assumptions on the nature of the light curve apart from the inevitable hypothesis of simultaneity of emission of photons of all energies at the source.