Wave di raction through an openingff

Alexandria of Egypt 12/14/2010, coordinates: 310 12′ 28.56” N, 290 53′ 34.66” E;

Theoule-sur-Mer,France 4/18/2010,coordinates: 400 32′ 27.33” N, 180 04′ 09.17” E.

Wave di raction causes circular fferosion of the beach

Campo di Mare, Italy, 4/18/2010,coordinates: 400 32′ 27.33” N, 180 04′ 09.17” E

Di raction ffproduced by a

boat

Di raction of waves ffagainst the end of a protection barrier

Cyprus, 7/7/2007, coordinates: 340 56′ 27.21”N,330 39′ 17.36”E. b

La Grande-Motte, France, 8/21/2006, coordinates: 430 33′ 18.71”N, 40 05′ 20.01”E

Sardegna, Italy, 8/18/2010, coordinates: 390 46′ 12.64” N, 80 27′ 28.82” E

Examples of wave refraction, the wave fronts bend approaching the beach

Villaricos, Spain, 4/26/2002, coordinates: 37 14 04.59” N, 1 47 04.79” E.

Chichiriviche, Venezuela, 4/27/2006, coordinates: 100 55′ 29.88” N,680 15′ 26.93” W

Examples of di raction ffand reflection of circular waves

Port Elizabeth, South Africa 11/8/2006, coordinates: 330 57′ 19.98” S, 250 38′ 33.05” E

River Thames, London, 11/06/2006, coordinates: 510 29′ 42.06” N, 00 03′ 37.86” E

Reflections of a boat wake by an obstacle

River Thames, London, England, 11/06/2006, coordinates: 510 28′ 05.40” N, 00 15′ 18.12” E

Reflections of a boat wake by an obstacle

Rimini, Italy, 5/28/2002, coordinates: 440 05′ 15.02” N,120 32′ 26.07” E

River Thames, London, 11/06/2006, coordinates: 510 27′ 40.79” N, 00 16′ 05.69” E

Interference between wave fronts

produced by the wakes of two boats

Interference between circular

waves coming from two openings

Chao Phraya River, Bangkok, Thailand, 8/20/2010, coordinates: 130 36′ 40.11” N, 1000 34′ 46.60” W

Interference from secondary sources