へいめんは
平面波
1. plane wave
2. Plane waveIn the physics of wave propagation, a plane wave (also spelled planewave) is a constant-frequency wave whose wavefronts (surfaces of constant phase) are infinite parallel planes of constant peak-to-peak amplitude normal to the phase velocity vector. It is not possible in practice to have a true plane wave; only a plane wave of infinite extent will propagate as a plane wave. However, many waves are approximately plane waves in a localized region of space.
Read “Plane wave” on English Wikipedia
Read “平面波” on Japanese Wikipedia
Read “Plane wave” on DBpedia
Read “Plane wave” on English Wikipedia
Read “平面波” on Japanese Wikipedia
Read “Plane wave” on DBpedia
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