Kuhle's job was to train Riggs, but for the first time anyone could remember, Riggs refused to practice with solid players or even exercise, his son says. Not once did he use Powers' lighted tennis court to do anything but goof around for the cameras or hustle matches. Instead, he'd play stragglers off the street for a few quick bucks. "It's very hard to turn down $500 if a guy wants to come out and play for $500. He can put that in his pocket," Kuhle says. "There was so much commotion going on, and he just felt he could beat her on roller skates."
Not all wavelengths of light can support photosynthesis. The photosynthetic action spectrum depends on the type of accessory pigments present. For example, in green plants, the action spectrum resembles the absorption spectrum for chlorophylls and carotenoids with absorption peaks in violet-blue and red light. In red algae, the action spectrum is blue-green light, which allows these algae to use the blue end of the spectrum to grow in the deeper waters that filter out the longer wavelengths (red light) used by above ground green plants. The non-absorbed part of the light spectrum is what gives photosynthetic organisms their color (., green plants, red algae, purple bacteria) and is the least effective for photosynthesis in the respective organisms.