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Hyper–Rayleigh scattering
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<p>Hyper–Rayleigh scattering optical activity , a form of chiroptical harmonic scattering, is a <a href="/facts/Nonlinear_optical/maerngXd">nonlinear optical</a> physical effect whereby chiral scatterers (such as nanoparticles or molecules) convert <a href="/facts/Light/jeofpMn4">light</a> (or other <a href="/facts/Electromagnetic_radiation/Ynx7ujCW">electromagnetic radiation</a>) to higher frequencies via <a href="/facts/Harmonic_generation/JrzN8cs1">harmonic generation</a> processes, in a way that the intensity of generated light depends on the chirality of the scatterers. "Hyper–Rayleigh scattering" is a nonlinear optical counterpart to <a href="/facts/Rayleigh_scattering/o0MQtPMM">Rayleigh scattering</a>. "<a href="/facts/Optical_activity/XQ3q2R3R">Optical activity</a>" refers to any changes in light properties (such as intensity or polarization) that are due to <a href="/facts/Chirality/hjx0eGrB">chirality</a>. </p>