How does light intensity affect the rate of photosynthesis?
Light intenstity is a factor which can limit the rate of photosynthesis. At low light intensities, if the light intensity is increased, the rate of photosynthesis increases. This is because light excites chlorophyll molecules, providing the energy for the production of carbohydrates. However, at higher light intensities, the rate of photosnthesis will level off. This is because another factor, which is now closer to its minimum level than light intensity, will be limitting the rate; for example carbon dioxide concentration or temperature.
