How Does Color Light Affect Photosynthesis

Sandy Kim

Period 4

IB Biology SL

Effect of color lights on photosynthesis rate

Personal Engagement I am interested in photosynthesis because before I have learnt about photosynthesis, I was wondering why most of leaves are green. Do not they have other colors like violet and yellow? It is important for me to investigate different colors of lights are affected by amount of photosynthesis because now I learn that chlorophyll, a main photosynthetic pigment, plays a vital role in a color that people observe. I want to find out which colors are the most effectively absorbed by chlorophyll. In order to prove it, elodea is needed because elodea is a typical plant to generate air bubbles, depending on light intensity and different foil sheets to

According to this figure, the sequence of the time from the least time to the most time is red, blue, pink, green, and yellow. From Figure 4, it is very close to the background information that chlorophyll absorbs red and blue lights most effectively and returns green and yellow lights more than other colors. It is revealed, according to the rate of photosynthesis. Therefore, rate of photosynthesis is pertaining to contrasting light colors.

The consequence shown in Figure 5 indicate that the fastest photosynthetic rate is red color, which is 0.68 bubbles per second, as expected. The next fastest reaction is the blue color with the rate of 0.61 bubbles per second then close to the blue color is pink with the rate of 0.40 bubbles per second and green with the rate of 0.29 bubbles per second. The slowest rate of reaction in this experiment is the yellow color with the rate of 0.15 bubbles per second. Though the results seems like it does not make sense, it is only the rate of green that messes up the experiment. The expected order of the rate from fastest to slowest is red, blue, green, pink, and yellow. If the rate of green were the lowest, the result of this experiment would have clearly matched the expected result. In fact, Figure 4 is fitting evidence that proves that the green color causes the result of the experiment to not be able to clearly provide evidence that matches

Light intensity is one of factors affecting photosynthesis. Depending on distance of light intensity, the result would be changed. Prior to the experiment, the distance should be settled. Even though it was expressed by using tape, it would be inexact. Therefore, improvement to the method would be to make the higher light intensities so as to be quite accurate, which denotes lamps would be adjusted to a beaker containing elodea from side to side because the smaller light intensities would be less accurate since the light spreads out, and the elodea might be exerted influence on other experiments or background light.

Lastly, the other fallacy derives from the water temperature. As the temperature of the water increases, carbon dioxide is produced up until its optimal temperature. In reality, when the plant attains the optimum, denaturalization of enzymes in elodea occurs so that that leads to cessation of oxygen.

Similar to this situation, same result would be created when the temperature is too cold. Even though the distilled water is used in this experiment, there could be the best temperature for elodea that can be producing air bubbles under light standing. In favor of fixing the limitation, several experiments that investigate the foremost temperature of elodea could be conducted