Essay PreviewMore ↓
I have been asked to investigate the link between wavelength of light
and rate of photosynthesis.
I predict that the order of best absorption in a plat to produce more
bubbles will be blue, yellow, orange, red and finally green. I predict
this because blue has the shortest wavelength which produces the most
energy and there is slightly higher absorption in the blue region by
the plant. The red has the largest wavelength in the visible spectrum
which produces the least energy. The reason why green is at the bottom
of the list of absorption in a plant is because green is reflected off
the plant and not absorbed as much as the others. It is reflected of
the plant to be seen as green in our eyes.
The spectral quality or colour of light is associated with its
wavelength. Blue light has a shorter wavelength and higher frequency
than red light. A simple table that indicates the wavelengths of
colours in the visible spectrum is shown below.
Colour of light
In photosynthetic plants the pigments are very important. They absorb
light energy and enable it to be converted into chemical energy which
is used by the plants to make glucose and oxygen from carbon dioxide
and water. Plants appear to be different colours because of the
dominant pigments they contain. These pigments absorb some colours of
light and reflect others, for example, the green chlorophylls absorb
light from the blue-violet and the red regions of the visible spectrum
and reflect green light. This is why plants which contain mostly
chlorophylls appear green. Other pigments found in green plants, the
yellow, orange and red carotenoids which absorb light only from the
How to Cite this Page
"Investigating the Link Between Wavelength of Light and Rate of Photosynthesis." 123HelpMe.com. 20 Jul 2018
Need Writing Help?
Get feedback on grammar, clarity, concision and logic instantly.Check your paper »
- Investigating the Effect of Light Wavelength on the Rate of Photosynthesis Plan ==== Method Take a 250cm3 beaker and fill it with distilled water. Use distilled water so there are no impurities to disrupt photosynthesis. Then take x cm's of elodia and put it in the beaker. Cover the elodia with the large end of a funnel and the tip of the funnel cover with a test tube. Then direct a light onto this experiment. Measure the amount of bubbles that come from the elodia for x minutes.... [tags: Papers]
348 words (1 pages)
- The Effect of Wavelength on Photosynthesis Rate Aim: To investigate how different wavelength (colors) of light affect the photosynthetic rate. I will use a pant that is a pond weed called elodea. I will measure the rate of photosynthesis by measuring the amount of o2 given off in bubbles per minuet from the elodea. I will do this by placing the Elodea in a test tube with sodium hydrogen carbonate then I will vary the light wavelength (color) using colored filters and count the number of oxygen bubbles given off using a pencil dot technique.... [tags: Papers]
1354 words (3.9 pages)
- The Effect of Absorption Rate on Light and Dark Colored Leaves. A particular leaf color may have an effect on the leaf’s absorption rate. An experiment was conducted to determine the relationship between a leaf’s absorption rate and color. A group of students tested spinach, cabbage, and no chloroplast solutions to determine the relationship it has with the absorption rate. It was found that darker colored leaves have a higher absorption rate than lighter colored leaves when analyzed from the graphs.... [tags: sunlight, chlorophyll, photosynthesis]
1006 words (2.9 pages)
- The influence of light on Photosynthesis Table of contents Front page and table of contents Page 1 Introduction Page 2 Review of literature Page 3 and 4 Methodology and presentation of findings Page 5 and 6 Procession of findings Page 7 Conclusion Page 8 Introduction In this project I believe the outcome will be that light energy is essential for photosynthesis to occur. The aim was to show that light is necessary for photosynthesis. Photosynthesis is the process of converting light energy into chemical potential energy and storing it as starch.... [tags: experiment, plants, energy]
1491 words (4.3 pages)
- Photosynthesis is the process of making glucose using the raw materials water, carbon dioxide and radiant energy. Which is trapped by the chlorophyll molecules and then oxygen is given off as a bi-product if the process. It is the conversion of radiant energy into chemical potential energy. The occurrence of photosynthesis is very important to us as humans, because it provides us with the oxygen we need to breathe and plants are at the bottom of every food-chain and so without them, I would collapse.... [tags: radiant energy, chlorophyll, glucose]
1377 words (3.9 pages)
- The Effect of Light Intensity and Temperature on the Rate of Photosynthesis Aim The aim of my experiment is to determine whether intensity of light and temperature would affect the rate of photosynthesis in a plant. To do this, I will place a piece of pondweed in varying light intensities and temperatures, and observe the amount of oxygen being given off. I am using pondweed because of its unusual quality of giving off bubbles of gas from a cut end, when placed in water. Introduction Photosynthesis occurs only in the presence of light, and takes place in the chloroplasts of green plant cells.... [tags: Papers]
2128 words (6.1 pages)
- Background Information: The leaves of a plant are the main photosynthetic organs and are involved in gas exchange and water transportation throughout a plant (Evans et al, 17). A leaf typically consists of an upper and lower epidermis, the mesophyll cells, veins, guard cells and stomata. The mesophyll cells contains spongey cells which have large gaps between each cell to allow oxygen and carbon dioxide circulation. The mesophyll cells contain palisade cells, which are located beneath the upper epidermis.... [tags: Experiment Analysis]
2609 words (7.5 pages)
- Photosynthesis in Relation to Light, Temperature and Water Light has three principal characteristics that affect plant growth: quantity, quality, and duration. Light quantity refers to the intensity or concentration of sunlight and varies with the season of the year. The maximum is present in the summer and the minimum in winter. The more sunlight a plant receives (up to a point), the better capacity it has to produce plant food through photosynthesis. As the sunlight quantity decreases the photosynthetic process decreases.... [tags: Papers]
1152 words (3.3 pages)
- Analysis of the Absorption of Green Light Versus Red Light Absorption in Spinach Leaves The goal of the experiment was to determine if green light had less ability to absorb than red light in spinach leaves. This was done by separating the photosynthetic pigments (chlorophyll a, chlorophyll b, carotene and xanthophylls) from one another using paper chromatography. The separated pigments were then analyzed for their absorption spectrum using a spectrographometer. When the data was graphed it clearly showed the higher rate of red light absorption over green light.... [tags: Photosynthesis Experiments Science Biology Essays]
1427 words (4.1 pages)
- Organisms Depend Upon Photosynthesis A. Organisms Depend Upon Photosynthesis 1. Photosynthetic organisms (algae, plants and a few other organisms) serve as ultimate source of food for most life. 2. Photosynthesis transforms solar energy into chemical bond energy of carbohydrates. 3. Most food chains start with photosynthesizers. Solar Radiation Key Discoveries of Photosynthetic Process Structure of Chloroplasts Function of Chloroplasts A. Solar Radiation 1. Solar radiation is described in terms of its energy content and its wavelength.... [tags: essays research papers]
1816 words (5.2 pages)
We can see how different wavelengths of light affect photosynthesis by
looking at action spectra. An action spectrum relates the rate of
photosynthesis to the wavelength of light being received by a plant.
For green plants, including algae, the action spectrum shows that most
photosynthetic activity takes place in blue-violet and orange-red
lights since these are the colours which are mostly absorbed by the
main chlorophylls and the carotenoids. Photosynthetic activity is
lowest in green light since green light is hardly absorbed at all by
these pigments. The relative absorption of light of different
wavelengths by pigments can be shown in absorption spectra. Action and
absorption spectra correspond quite closely. Wavelengths of light
which are more readily absorbed by photosynthetic pigments cause
higher levels of photosynthesis.
Some plants live in conditions where the spectral quality of light may
be different to that received by plants living on the land. Algae
which live in surface waters tend to be green and contain more or less
the same pigments as land plants since they exist under similar light
conditions. Algae living lower in the water receive more blue light
than red because red light has a relatively long wavelength and cannot
penetrate water as well as blue light which has a shorter wavelength
and more energy than red light.
Brown algae, which may be found deeper in the water than green algae,
have combinations of pigments which enable them to photosynthesise
using less of the red light utilised by green plants. Red algae, which
tend to be found at even greater depths, contain more pigments to
absorb the blue light which penetrates deeper into the water.
It is the combination of pigments in a plant which determines which
wavelengths of light can be utilised in photosynthesis. No plant
absorbs light with equal effectiveness across the visible spectrum.
This is why different colours of light may affect photosynthesis and
the subsequent growth of plants.
The equipment that I used was:
· Ruler - measure the distance between the lamp and the plant
· Timer - measure time
· Sodium hydrogen carbonate
Firstly I collected the equipment and set it up. We then filled the
beaker with 400ml of 2% sodium hydrogen carbonate. To this we added
the elodea and placed the beaker 50 cm away from the lamp. We then
placed a coloured filter and placed it in front of the lamp. We left
the plant there for 2 minutes (acclimatise to the conditions), and
then placed the syringe over the plant. We decided that we would
measure the volume of gas evolved from the plant during a 5-minute
period. We then repeated using the same colour to ensure that our
results are accurate. Once that was completed we changed the colour of
the filters, we will use the following colours: Violet, blue, green,
orange, yellow and red.
We tried to keep the water well away from the electricity. We also
tried to be careful when using the blade to cut the plant.
We tried to pop all the bubbles as soon as they formed. We also used
the same plant and same quality of chemicals. We also kept the light
the same distance from the plant throughout the experiment.
From the results that I have gathered I can state that certain
wavelengths affect the rate of photosynthesis more than others. My
results were not exactly the same as the graph on page two, but
several different things could cause this. Human error may have caused
the results to be inaccurate. Some white light could have been used by
the elodea, causing the rate of photosynthesis to go up slightly. The
heat being produced from the light may have also affected the rate of
photosynthesis. Since temperature affects the movement of molecules
and the reactions worked by enzymes, the heated molecules and enzymes
may be the cause of the increasing rate of photosynthesis, because
photosynthesis works using enzymes.
My results fit my hypothesis quite well, as the order of colours in
the hypothesis fit the results and the graph quite well, except for
one colour, blue. This could have happened because of impractical
mistakes made in practical.
In the table, the results show that I have consistent results.
Although they are consistent I do not think they are very accurate. In
hypothesis I said that blue would be the most absorbed as it has the
most energy to produce more oxygen. But as seen in the graph and
results table, it only has the second highest bubble rate. Another
strange result that I had was that green did not have the lowest
bubble rate. I would have expected green to have the lowest bubble
rate as the plant was also green, meaning that the green light should
have been reflected back by the plant. However this could be because
of a number of reasons, the shade of green that the filter was could
have been a different shade to that of the plant.
I could do more experiments for this investigation, as there are two
more things that can be varied to change the release of oxygen in the
plant. The two other factors are the amount of carbon dioxide added
and water added. I could also vary the intensity of light on the plant
to change the amount of oxygen released. This coursework
As a conclusion to this experiment I think my results were good enough
to say that they fitted my hypothesis and that with a little more
precaution I could have proved my hypothesis completely correct.