Considering　each　of　the　thermal　fields,　viscoelastic　and　electromagnetic　fields　contribute　to　the　total　deformation　of　a　body　and　interact　with　each　other.　Reflection　of　magneto-thermoelastic　waves　under　generalized　thermoviscoelastic　theories　is　employed　to　study　the　reflection　of　plane　harmonic　waves　from　a　semi-infinite　elastic　solid　in　a　vacuum.　The　expressions　for　the　reflection　coefficients,　which　are　the　ratios　of　the　amplitudes　of　the　reflected　waves　to　the　amplitudes　of　the　incident　waves,　are　obtained,　and　the　reflection　coefficient　ratios　variation　with　the　angle　of　incidence　under　different　conditions　are　shown　graphically　when　acrylic　plastic　materials　are　considered.