Biomathematics have proposed many different functions for describing the effects of light on the rate at which photosynthesis can take place. If the function is to be realistic, then it must exhibit the photo inhibition effect. That is the rate of production P of photosynthesis must decrease to 0 as the light intensity I reaches higher and higher levels. Which of the following formulas for P, with a and b constant, may be used?
1) P= (aI)/(b+I) or 2) P= (aI)/(b+I^2)