In the nonlinear hyper version of this effect, otherwise forbidden silent modes are seen, and in another variant, its strength is increased by the excitation of plasmons in small metal particles.  The stimulated form of it can be used in silicon chips or fiber optics to create an eponymous kind of laser, and in biological applications of it, a 785 nanometer source is often used to minimize the competing effect of fluorescence.  Three lasers are used to gather information about the vibrational modes of chemical bonds susceptible to changes in po
In the nonlinear hyper version of this effect, otherwise forbidden silent modes are seen, and in another variant, its strength is increased by the excitation of plasmons in small metal particles.  The stimulated form of it can be used in silicon chips or fiber optics to create an eponymous kind of laser, and in biological applications of it, a 785 nanometer source is often used to minimize the competing effect of fluorescence.  Three lasers are used to gather information about the vibrational modes of chemical bonds susceptible to changes in polarizability in the coherent anti-Stokes variety of it. For 10 points, identify this type of inelastic scattering named for its Indian discoverer.
In the nonlinear hyper version of this effect, otherwise forbidden silent modes are seen, and in another variant, its strength is increased by the excitation of plasmons in small metal particles.  
Raman scattering [or Raman effect; or Raman spectroscopy; prompt on inelastic scattering]