Reflection and refraction of waves in oscillatory media

This paper uses the two-dimensional Brusselator model tostudy reflection and refraction of chemical waves. It presents someboundary conditions of chemical waves, with which occurence ofobserved phenomena at interface as refraction and reflection ofchemical waves can be interpreted. Moreover, the angle of reflectionmay be calculated by using the boundary conditions. It finds thatreflection and refraction of chemical waves can occur simultaneouslyeven if plane wave goes from a medium with higher speed to a mediumwith lower speed, provided the incident angle is larger than thecritical angle.