"The light spectra throws up into the night sky is a unifying point," says Boris Johnson.
But white light comprises a rainbow of visible colours of light, or light spectra -- any one of which could have different physiological effects in, say, a bird.
It also suggests that different light spectra may affect physiology differently, thus, using different spectra for street lights may potentially reduce the disturbances caused by light pollution to free-living wildlife.
He also investigated the light spectra of gases and vapours, worked on the passage of electricity through gases, and discovered new properties of cathode rays (electron rays).
Specific light spectra play an important role in plant photomorphogenic responses.
Four light spectra 3R3B3IR, 9IR, 9R and 9B did not induce any somatic embryos (Table 2).
Conversion of somatic embryos to plantlets was observed in light spectra 9R and 9B (Fig. 1k).
Atomic emission lines of Fe, Cr and Ni were found in the light spectra.
If the light spectra locate in the visible range, the color of materials can be observed by naked eye.
Concentrations of ABA and different LED light spectra had a significant influence on somatic embryogenesis in P. japonicum.
The maximum chlorogenic acid (3.44 mg/g dw) was recorded in callus exposed to light spectra '3R3B3IR'3R3B3IR
