The chromophore is the part of a molecule responsible for its colour.
- Things appear to have colour because they absorb some wavelengths of light and reflect others.
- The result of wavelengths of light within the visible spectrum entering the human eye is the experience of colour for an observer.
- The chromophore is the region of a molecule where there is an energy difference between two separate molecular orbitals.
- A molecular orbital describes the location and wave-like behaviour of an electron as it travels around the nucleus of an atom.
- If the energy difference of a chromophore falls within the range of the visible spectrum (2 to 2.75 electron volts) then it will produce colour.
- The colour produced by a surface or object corresponds with wavelengths of light that are not absorbed during its interaction with the chromophore.
Related diagrams
Each diagram below can be viewed on its own page with a full explanation.
