Bessel beam
present participle of new name
Outside of a person's consciousness.
A wistful or melancholy longing.
A field of electromagnetic, acoustic or gravitational radiation whose amplitude is described by a Bessel function of the first kind.
実験中、研究チームは試料に第一種ベッセル関数で振幅が記述されるビームを集束させ、長く回折しない励起線を作り出した。
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