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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The derivatives have strong absorption capability in an ultraviolet-visible light region, the dilute solution thereof emits strong fluorescence, and luminous peaks are between 600nm and 650nm.

这些衍生物在紫外-可见光区有强吸收，并且其稀溶液发射强荧光，发光峰位于600 - 650纳米之间。

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For example, iron-gall ink, commonly used on ancient documents, is transparent to infra-red light and most visible in the ultraviolet region of the spectrum.

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