As Overland Mail's indebtedness to Wells Fargo climbed, Wells Fargo became increasingly disenchanted with Butterfield's management strategy. In March 1860, Wells Fargo threatened foreclosure. As a compromise, Butterfield resigned as president of Overland Mail, and control of the company passed to Wells Fargo.
It turns out that virtually no light with wavelengths longer than 690 nm is converted or captured by chlorophyll or carotenoids. Also, some light of shorter wavelengths than what humans can see is used by photosynthesis. Chlorophyll-a, chlorophyll-b and carotenoids all use light of wavelengths shorter than 390 nm. Interestingly, Chlorophyll-a can use light with wavelengths as short as 350 nm. This is getting into the UV or ultraviolet (above or beyond violet) range. For practical purposes, photosynthesis in general utilizes wavelengths of light from about 380 nm to 690 nm.
Answer 1: Photosynthesis is the ability of plants to absorb the energy of light, and convert it into energy for the plant. To do this, plants have pigment molecules which absorb the energy of light very well. The pigment responsible for most light-harvesting by plants is chlorophyll, a green pigment. The green color indicates that it is absorbing all the non-green light-- the blues (~425-450 nm), the reds and yellows (600-700 nm).