Wave refraction bends wave crests as they approach shore with an irregular coastline, concentrating wave energy on protruding headlands (where water is shallower and wave orthogonals converge) while spreading (dispersing) energy in adjacent bays (where orthogonals diverge).
As waves approach an irregular coastline, refraction causes wave energy to converge and concentrate on headlands (due to the shallower water offshore of a headland...
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