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Red and blue light have the greatest effect on plant growth after white light The main segment is chlorophyll which reflects green lights I Green and yellow light are the least effective Plants can utilize light in both the red and orange end and the blue end of the spectrum Blue light is more useful for vegetable growth Red light is more useful for reproductive and root growth Green and yellow light is reflected and not very helpful in plant growth The most important wavelengths of the blue spectrum are from Mann to Mann (cool light) The most important wavelengths in the re spectrum are from Mann to NM (warm light) Green and yellow light are mostly reflected off the plant and that is why it appears green in color Photosynthesis occurs more quickly with the correct amount of energy White light has a similar growth to blue light but slower.

White light is the optimal wavelength for photosynthesis because plants are able to absorb all other colors of ROUGHLY Temperature affects plant growth It cannot be too hot because the plat will shrivel up It cannot be to cool, or the plant will freeze Ideal temperature for photosynthesis to occur is 68-95 degrees Fahrenheit Materials: The materials of this experiment included: 5 owe light bulbs, 15 sugar snap peas seeds, 15 z. Styrofoam cups, 5 boxes, soil, 1 sheet of red cellophane, 1 sheet of blue cellophane, 1 sheet of green cellophane, 1 sheet of yellow cellophane, a beaker to measure the water, a light timer, and a ruler. Independent and Dependent Variables: The independent variable in this experiment was the wavelength of light. The dependent variable in this experiment was the plant growth.

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Constants: The amount of light each plant received How each plant was planted Where each plant was planted (in box) Amount of water each plant was given Control Group The control in this experiment was the white light because it has all the colors available to the plant. Procedure: 1. Each box was placed in a room set to 70 degrees Fahrenheit 2. Each Styrofoam cup was filled with z. Of soil 3. One ingeminated sugar snap pea was planted in each cup 4. A hole was cut big enough for the light bulb to fit in the top of the box 5. A pacific color of cellophane was placed on each light bulb 6. Each light was placed in the hole previously cut out on each box. 7. Each light was connected a timer in order to regulate the amount of light each plant received 8. Three Styrofoam cups were placed in each box. 9. Each plant was given one tablespoon of water a day 10.

Measurements(in centimeters) were taken and recorded for each plant daily for four weeks Data Chart: Total Growth of Sugar Snap Peas Using Different Color Lights after 4 Weeks Light Color Height of Plant (CM) Red Light 18. 4 Blue Light 20. 6 Green Light 18. 3 Yellow Light 17. 3 White Light 20. 9 Data Graph: Average Growth of Sugar Snap Peas under Different Wavelengths of Light Conclusion: This experiment has proved that blue and white light are most beneficial for plant growth during photosynthesis. Next comes red light, then green, then yellow. The prime reason green and yellow light were the least beneficial to plant growth during photosynthesis is because the plant reflects these two lights the most, rather than use it for energy.

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