21. In 1868 they noticed, in the solar spectrum , a bright yellow line which did not correspond to any substance then known. 22. The Switching fluid in the greenhouse roof can be used as a filter for a certain part of the solar spectrum . 23. He also made a series of elaborate measurements of the wavelengths of the solar spectrum by means of a large spectrometer. 24. Therefore, O'Brien, as a physicist on staff, developed a carbon arcs with cored carbons that very closely matched the solar spectrum . 25. AM1.5 solar spectrum , together with the maximum electricity conversion efficiency for every junction as a function of the wavelength . ]] 26. First, the bandgap should be reduced to absorb red photons, which contain a significant fraction of the energy in the solar spectrum . 27. It absorbs almost all the radiation in the visible portion of the solar spectrum and emits very little in the infrared range. 28. In 1996 he created a solar spectrum environment for the Dwan Light Sanctuary at the United World College in Montezuma, New Mexico. 29. Between 2003-08 he coordinated the " Fullspectrum " project for developing methods to make more efficient use of the full solar spectrum . 30. These use a combination of several layers of gallium arsenide, indium gallium phosphide, and germanium to capture more energy from the solar spectrum .
