Photosynthesis is the process by which autotrophic organisms convert light energy to chemical energy in the form of glucose. Without this process life on earth would be very different because every organism directly or indirectly depends on photosynthesis. Photosynthesis helps the plants to grow roots, leaves, flowers and fruits. It is an extremely important process because plant tissue serves as the bottom of every food chain. The process of photosynthesis is dictated by a number of factors one of which is light. Light energy is essential for photosynthesis. Light contains wavelength that may vary in color through absorption and reflection. The different color of light may affect the rate of photosynthesis. Statement of the Problem
This study aims to determine if the color of light affects the amount of oxygen created through the process of photosynthesis by Hydrilla, an aquatic plant. It specifically seeks answer to the following problem:
1. Which color of light affects the evolution of oxygen as sign of photosynthesis? Hypothesis
The following hypothesis will be tested in this study:
1. Hydrilla will produce the most oxygen when exposed to certain color of light. Significance of the Study
The study is significant to farmers, landscaping businessmen, gardeners and plant enthusiasts in enhancing the growth of plants. The use of specifically colored artificial light where Hydrilla lives which consequently effect greater amount of oxygen released during photosynthesis is deem thought of having greater impact on the macro scale in the world of plant growth. World Hunger is a major concern, if a process could be found through which photosynthetic rate is maximized perhaps food production could be maximized as well and hungry mouth may be fed. Scope and Limitation of the Study
The study has its own limitations. To determine if the color of light affects the amount of oxygen released through the process of photosynthesis by Hydrilla, only the red, blue, yellow and green component color of light were chosen. Due to the unavailability of colored light bulbs, simulation of such using red, blue, yellow and green cellophane as wrappers is done. Since there is no available instrument to measure the amount of oxygen released by the Hydrilla plant in the process, we will simply measure the length of rise of the test tube in 10- minute exposure to light. Definition of Terms:
HYDRILLA(Hydrilla verticillata) or water thyme is a submersed plant. LIGHT refers to the artificial light coming from the overhead projector. PHOTOSYNTHESIS is the process by which autotrophic organisms convert light energy to
chemical energy in the form of glucose. REFERENCE POINT refers to the mark in the test tube that corresponds to the tip of the funnel
at the end of the 10th minute exposure of the set-up to light. RED LIGHT, BLUE LIGHT, YELLOW LIGHT, GREEN LIGHT refer to the components of artificial
white light. Red light is simulated when the beaker is wrapped with red cellophane; blue
light when the beaker is wrapped with blue cellophane; yellow with yellow
cellophane; and green light with green cellophane. VOLUME OF OXYGEN RELEASED corresponds to the length measured from the base of the
test tube till the marked reference point expressed in millimeters.
Review of Related Literature
Plants are green because they reflect green light more than any other part of the color spectrum, therefore if a plant is only exposed to green light it will reflect more than if it were placed under a red light thereby making photosynthesis less efficient.
The colors that plants use during photosynthesis come from both ends of the light spectrum. The plants use the greens and yellows during germination and it reflects it giving plants its color. It uses the other end with the blue and red by absorbing it and using it to create ATP energy and grow sufficiently. The formula for photosynthesis...
Bibliography: 1. Busche, Frederick (1972) Principle of Physics. 2nd Edition, McGraw Hill Book Company, New York
3. Meyer R.,Donnet L.and Hacket T. (2002) McGraw Hill Science National Geographic Society, New York City
Please join StudyMode to read the full document