Spiral waves in excitable media possess both wave-like and particle-likeproperties. When resonantly forced (forced at the spiral rotation frequency)spiral cores travel along straight trajectories, but may reflect from mediumboundaries. Here, numerical simulations are used to study reflections from twotypes of boundaries. The first is a no-flux boundary which waves cannot cross,while the second is a step change in the medium excitability which waves docross. Both small-core and large-core spirals are investigated. The predominantfeature in all cases is that the reflected angle varies very little withincident angle for large ranges of incident angles. Comparisons are made to thetheory of Biktashev and Holden. Large-core spirals exhibit other phenomena suchas binding to boundaries. The dynamics of multiple reflections is brieflyconsidered.
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