A potted plant is shifted from sunlight to red light of wavelength 700nm.what will be rate of photosynthesis?
In prerequisite courses you have studied the light reactions quite extensively. Here I would just like to hit the high spots. First, light has wave properties. the length of the wave determines the energy and color of the light. Human vision and photosynthesis cover the range of wavelengths from 400 to 700 nanometers. The high-energy end of this spectrum is the shorter wavelength purple light at 400 nm. The rest of the rainbow and decreasing energy follows as wavelengths increase to the lowest-energy red light at 700 nm. Light also has photon, particle, properties. Light intensity is measured as photon flux density: photons per square meter per second. Sunlight provides a plant with tremendous energy. Plants tap small amounts of energy in some very interesting biochemistry, releasing in each step some energy in the form of heat. So photosynthesis obeys the Second Law of Thermodynamics in every way. Because short-wavelength light has higher energy, you might expect plants to use that pa
