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Green plants absorb and convert light energy into chemical energy for use during photosynthesis, a process by which plants make sugar. Green plants do not absorb green light, though. Green light is reflected, thereby making leaves appear green. |
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Experiment 1 Two students investigated the effects of different colored lights on photosynthesis. They created a filter that blocked green light, a filter that blocked red light, and a filter that blocked all light. Each filter was placed on a leaf, as shown in Figure 1. The rate of photsynthesis in the various portions of the leaf was determined indirectly by measuring starch (sugar) concentration. The results are summarized in Table 1. |
Figure 1
Table 1
