The Relationship between Light and Photosynthesis

1122 WordsFeb 20, 20184 Pages
Introduction Photosynthesis is the conversion of light energy from the sun into chemical energy. During this process light energy is absorbed by the chlorophyll molecule (a green pigment found in chloroplasts of plant cells) and is then used to convert carbon dioxide and water into simple sugars, glucose. The chlorophyll molecules however absorb different colours enabling plant growth as well as food production and by this it could be identified whether photosynthesis does occur or not. Blue and red light are the most absorbed and this is because they are colours that are most effective when driving photosynthesis. Green light is reflected which is why leaves appear green. Plant growth will occur the most under the red and blue light but not green. This is because red light wavelengths which are absorbed by the leaves of the plant will produce a hormone which stimulates budding and flowering of plants and blue light will promote photosynthesis which increases the rate at which it occurs. The relationship between light, plant growth and photosynthesis is extremely important because if there is no light, photosynthesis will not take place however limiting the plants growth. Light can limit the whole reaction of photosynthesis if it’s not present no matter how the temperature and carbon dioxide is increased, photosynthesis will still not occur. Hypothesis: The plants exposed to red and blue light will show the most growth therefore photosynthesis will occur.
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