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Light Research |
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Abstract I did my experiment to find the effects of different shades of light on plants. ... I hypothesized that white light would work the best because it contains all the colors of the spectrum. ... The materials I used were four plastic drop lights, four 60 watt light bulbs, four large cardboard boxes, eight clear plastic cups, five inches of soil in each cup, eight pole bean seeds, a tablespoon measurer, and eight 1 cm diameter dowel rods. ... I then put two plants and a light in each of the cardboard boxes. ... The white light plants grew the best and looked the healthiest at approximately 11. ... The plants under the red light grew to about 8 inches each, but didnt look as lush and strong as the white plants. The green light plants looked more healthy than the red plants but were only about 4 and 3. ... The plants under the ultraviolet light had barely enough visible light to survive. ... According to my experiment, plants grow best in white light. I believe this is true because the chlorophyll in the leaves can filter out which color of light works best2. Even though red light works very well with chlorophyll, white light contains other colors of the spectrum such as violet and blue which helps the plant greatly in photosynthesis3. ... During this process, the plant takes in light energy, oxygen, and water to form the molecule glucose. A simple equation for photosynthesis is as follows: light energy 6O + H O C H O + 6O chlorophyll When light energy meets with chlorophll, electrons are excited which starts photosynthesis. |
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Title: Light Research
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