BIOL 350 Lecture 13: L13 17-10-2017
Document Summary
The entire range of radiation is known as the electromagnetic spectrum. Specific segment that is important to life is 400-700 nm aka. Visible light : can be detected as varying colors by the human eye. Just right for: photosynthesis, phototaxis and phototropism, photomorphogenesis, biological rhythms, vision in most animals. White light is a mixture of all the wave lengths of visible light. Black absence of all of it. Prism can sort white light into into its component colors by bending light of different wavelengths to different angles. Photosynthesis rate generally increases with intensity of visible light, although shade tolerant plants have a point of photoinhibition after which photosynthetic rate slows due to closure of stomata and other regulatory mechanisms. But, shade tolerant plants have a point of photo-inhibition after which photosynthetic rate slows due to closure of the stomata and other regulatory mechanisms. Chlorophyll in chloroplasts absorb red and blue violet (most effective in driving photosynthesis)
