$12.1 mechanical waves Seismic waves =150m/s earthquakes produce both longitudinal and transverse waves →d=7△ Sand scorpion located its prey by using longitudinal and tuc pulses transverse waves. Transverse Beetle th 812.2 one-dimensional waves and the equation of waves 1. Wavefunction of one-dimensional waves moving at constant velocity y(x,0)=y(x) y(x,)=y(x) =Y(r-vt) y(x,t)=平(x’) Y(x+v)4 Seismic waves— earthquakes produce both longitudinal and transverse waves Sand scorpion— located its prey by using longitudinal and transverse waves. §12.1 mechanical waves = 150m/s = 50m/s d t v d v d t l t ∆ = − ⇒ = 75∆ §12.2 one-dimensional waves and the equation of waves 1. Wavefunction of one-dimensional waves moving at constant velocity x y o x(x´) y y´ o o´ x • • vt x′ P P y(x,0) =Ψ(x) ( ) ( , ) ( ) Ψ x vt y x t Ψ x = − = ′ v → −v ( ) ( , ) ( ) Ψ x vt y x t Ψ x = + = ′