9Limiting Factors PhotosynthesisMedium1 mark
The table shows the results of an experiment to investigate the effect of light intensity on the rate of photosynthesis.
| light intensity / arbitrary units | volume of oxygen produced per hour / mm |
|---|---|
| 1.0 | 2.5 |
| 4.0 | 7.0 |
| 8.0 | 9.0 |
| 11.0 | 9.0 |
At which light intensity does a factor other than light begin to limit the rate of photosynthesis?