phototropy


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phototropy

(ˌfəʊtəʊˈtrəʊpɪ)
n
1. (Chemistry) an alteration in the colour of certain substances as a result of being exposed to light of different wavelengths
2. (Chemistry) the reversible loss of colour of certain dyestuffs when illuminated at a particular wavelength

phototropy

The ability of certain substances to change color reversibly on exposure to light of a certain wavelength.