Meanwhile, invisibility at visible frequencies has been a fancy dream of people for long.

尤其可见光波段的隐身更是人类长久以来的梦想。

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Electromagnetic radiation with frequencies in the ultraviolet and visible region can be absorbed by molecules.

分子能吸收频率在紫外和可见光区的电磁辐射。

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It is able to highlight details human eyes cannot normally see, either because they are swamped by the signal from other visible frequencies, or because they are not detectable by the rod and cone cells of the retina.

ECONOMIST: Monitor

Multispectral imaging works by scanning objects at a series of specific frequencies both within and beyond the visible spectrum.

ECONOMIST: Monitor