Fig. 3. Reflectance spectra of the red, orange UV+ and UV- background colours on the stimuli, as measured through the appropriate overlying filter. All stimuli were covered by a UV-blocking filter, except the UV+ stimuli, which were covered by a UV-transmitting filter (see Fig. 1 for transmission spectra of the individual filters). Spectra are means of 10 measurements from different random locations on each background colour.

Return to article