They suggest that any alien civilisation worth its salt would alight not on the photons of the electromagnetic spectrum-whether optical or radio-frequency-to send messages to other solar systems.
他们指出，任何有头脑的外星文明都不会发射电磁波谱中的光子——无论是可见光波段还是射频波段——向另一个太阳系传送信息。
Due to the quantization of electromagnetic fields there is an upper frequency limit in the spectrum of any finite energy transmitted by an electromagnetic system.
由于电磁场的量子化效应，电磁系统发射有限能量的电磁场，其频谱必有一高频率上限。
The submillimeter wave plays a very important role between the infrared and millimeter wave in electromagnetic wave frequency spectrum. Therefore, it has important academic value.
亚毫米波在电磁波频谱中处于红外线与毫米波之间非常重要的位置，因此在学术上有很重要的研究价值。
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