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The Effects of Different Light Colors on Photosynthetic Rate

LIGHT [IMAGE]Carbon Dioxide + Water Glucose + Oxygen CHLOROPHYLL Where does photosynthesis occur?

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wavelengths of light to continue photosynthesis.

Our results are contradictory with our hypothesis, based on our statistical results. There were several problems with our experiment that could have been taken into consideration. First, when taking respiration rates the foil wasn’t covering the chamber all the way letting some external light in. Second, the colored cellophane only allows approximately 70% of light through; this might have prevented the plant from absorbing the amount of light energy needed to have a significant photosynthetic rate. Third, the fast paced moving between trials lost time and efficiency. By having short trials (2.5 min.) we might not have allowed the plant enough time to adjust its photosynthetic rate to the different wavelengths of light energy. Plus by moving the plant, and switching from cellophane to foil (or vise versa), might have screwed up the photosynthetic cycle by exposing it to white light.

Aim: We will be trying to see if light intensity has an effect on the rate of photosynthsis.

During the process of photosynthesis, carbon dioxide plus water in the presence of sunlight, enzymes and chlorophyll produce glucose and oxygen as waste product.

Color & Light Effects on Photosynthesis | Hunker

Photosynthesis requires the following resources; Carbon Dioxide, Water and light.

Prediction: I predict that as the light source (desk lamp) is moved closer to the pondweed (Elodea), the rate of photosynthesis will increase therefore more oxygen will be produced creating more bubbles.

I believe this will happen because when the light source is nearer to the plant more of the plants surface area is coming in to contact with the light from the desk lamp therefore more photosynthesis will occur which will mean more oxygen will be produced which will create more bubbles....

Affect of Different Colored Lights on Photosynthesis

As out lined in the introduction, light is essential for the process of photosynthesis.

Glucose may be oxidized completely if sufficient
oxygen is available, illustrated by the following equation:
C6H12O6 + 6 O2 ⟶6 H2O + 6 CO2 + energy
The rate of photosynthesis is affected by numerous factors including the amount
and the wavelength of light available.

Phycobilins absorb in
Biol 171L – FA15 Effect of Light Color on Photosynthesis 7-4
the green and orange portion of the spectrum and are important for allowing marine and aquatic
plants to harvest the wavelengths not filtered out by the water.
The process of photosynthesis involves the use of light energy to convert carbon dioxide
and water into sugar, oxygen, and other organic compounds.

Evaluation: For my experiment, I had to find out whether light affects the rate of photosynthesis.
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  • Effect of colour of light on the rate of photosynthesis

    As discussed in the introduction light is one of the limiting factors in the process of photosynthesis.

  • The Effect of Light on Photosynthesis :: Papers - …

    My results agree with my prediction that was; the closer to the light the faster the rate of photosynthesis.

  • Effect of color on photosynthesis rate - SlideShare

    Prediction:I predict that raising the light intensity will increase the rate of photosynthesis.

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The Effect of Light Intensity on Plant Growth | Hunker

Our results show that different color lights definitely does have a strong direct correlation with the rate of photosynthesis/growth of a plant.
Absorption spectra showing how the different side chains in chlorophyll a and chlorophyll b result in slightly different absorptions of visible light.

#41 Effect of Light intensity on the rate of Photosynthesis

Visible light participates in photosynthesis.
Pigment absorption
Absorption spectrum
1) Pigment absorbs light
2) An electron becomes excited
3) The electron rapidly returns to ground state

What Is Happening?
• In the light reactions of photosynthesis, photosystems embedded in the thylakoid membrane contain pigments that absorb photons.
Connection to Photosynthesis
1) Pigments absorb photons and transfer the energy to special chlorophyll molecules within the reaction center of a photosystem
2) An electron of the chlorophyll molecules becomes excited and a primary electron acceptor receives the electron
3) The electron travels down the electron transport chain

Rate of Photosynthesis Under Different Wavelengths
The rate of photosynthesis is affected by the different wavelengths of light a plant is exposed to because different pigments in chloroplasts absorb different wavelengths for use in photosynthesis.
Nicole Rossi and Emily Wang
AP Biology 3* & 7*

Does color really affect the plants growth

The plant responded to the different colored light as follows: The rate of photosynthesis was the most successful in white light, and more successful in red and blue lighting, than in green and yellow lighting systems.

The color or wavelength of light does affect photosynthesis, ..

Green or yellow light will have the slowest rates of photosynthesis because they are reflected by the pigments in the plant.
In this lab experiment, the team examines how the rate of photosynthesis is affected by different light colors in the leafs.

Effects of Blue and Red Light on the Rate of Photosynthesis

Prediction : I predict that as I increase the distance between the light source and the Canadian Pondweed (reducing the light intensity), the volume of oxygen produced within the time limit (the measure of the rate of photosynthesis) will decrease.

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