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Tariffs and import quotas tend to:
Absorption Spectra
Absorption spectra are the range of wavelengths or frequencies of light absorbed by a substance, each substance having a unique spectrum that can be used to identify it or analyze its properties.
Pigments
Substances that produce color in materials by absorbing certain wavelengths of light and reflecting others, found in nature in plants, animals, and minerals.
Visible Light
The portion of the electromagnetic spectrum that is visible to the human eye, ranging approximately from 380 to 750 nanometers in wavelength.
Photosynthetic Pigments
Molecules found in plants and other photosynthetic organisms that absorb light energy for use in photosynthesis, including chlorophyll and carotenoids.
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