backscattering  search
UFback-scattering
RTspectroscopy
 acoustical methods
 geophysical methods
 waves
 geophysics
 seismic methods
 distortion
 attenuation
 wave dispersion
 infrared methods
 electromagnetic waves
 multiple reflections
 optical dispersion
 radar methods
 reflection
 X-ray analysis
SNGeneral. Used with many types of radiant energy. Added to Thesaurus in 1995.