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Increasing the light intensity will boost the speed of photosynthesis. Carbon dioxide concentration. Sometimes photosynthesis is limited by the concentration of carbon dioxide in the air. Even if there is plenty of light, a plant cannot photosynthesise if there is insufficient carbon dioxide.
Light Intensity and the Rate of Photosynthesis. Based on the data collected, the distance the lamp was placed from the test tube with the Elodea plant in it did affect the number of bubbles that formed and floated to the top of the test tube.ince the oxygen bubbles are a product of photosynthesis, one can conclude that the more bubbles formed, the more photosynthesis occurred, thus increasing the rate of photosynthesis. Experimental Design. This experiment will look at the affect of light intensity on the rate of photosynthesis on Elodea plants.