text: Due to material defects, this phenomenon gives the overall lower bound on losses in propagation in optical fibers.
full_question: Due to material defects, this phenomenon gives the overall lower bound on losses in propagation in optical fibers. The original derivation of this effect failed to predict the Arago point and two other neutral points of zero polarization. The intensity of this phenomenon is proportional to wavenumber to the fourth power and varies inversely with the (*) sixth power of radius. Its cross-section is proportional to the sine- squared of the angle, which creates a polarization pattern that varies with azimuth. This effect, which occurs only if the wavelength is much larger than the particle diameter, does not impact the energy of the incident photon, unlike Raman scattering. For 10 points, name this form of elastic scattering which explains why the sky is blue.
first_sentence: Due to material defects, this phenomenon gives the overall lower bound on losses in propagation in optical fibers.
raw_answer: Rayleigh scattering [prompt on Mie scattering]