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Color and Chemical Complex
In explaining the colours of coordination compounds, the phenomenon of complementary colours is dealt with: if a compound absorbs light of one colour, the complement of that colour is to be seen. For example, when white light containing a broad spectrum of all visible wavelengths passes through a substance that absorbs red light, the colour observed is green. Green is the complement of red, so green predominates visually when red light is subtracted from white. Complementary colours can conveniently be remembered as the colour pairs on opposite sides of the colour wheel shown in the margin. Of course, the structure of complex directly affects how incident radiation is absorbed. But the structure of complex relies on how metal ion linearly combine its ligand in their molecular orbital. Therefore, there are many different colours in remote sensing imagery in or near visible region.