Science Fair. SAI, MINT, PLOY. Question. How different colors of light affect the oxygen production of plants ? Does different wavelength of light effect the amount of oxygen plants produce?. Purpose. To find our if photosynthesis in plants would be affected by different wavelength of light.
SAI, MINT, PLOY
How different colors of light affect the oxygen production of plants?
Does different wavelength of light effect the amount of oxygen plants produce?
Order of rainbow is determined by the wavelength of light. Visible light is one small part of the electromagnetic spectrum. The longer the wavelength of light, the more red the color. The shorter wavelengths are towards the violet side. Wavelength that longer than red are called as infrared, while shorter than violent are ultraviolet.
If we put the plant in the enclose box and give it different light spectrum (green, red, and blue), then red and blue spectrum would increase the frequency of oxygen production the most. According to our background research, the color that we see from an object is that color because it absorb all light spectrum except that color, and it reflect that color. The plant has green pigment; therefore we predict that it will absorb blue and red the most, so red and blue light will be most useful for the photosynthesis, and it will produce a lot of oxygen.
7. Use the rubber bands to tie up both the detector and the plastic bag
8. Untwist the bag and start collecting the data: at least 5 mins each
9. Twist the bag again when you're done collecting the data
10. Untie the rubber bands
11. Take out the Oxygen detector
12. Tie the rubber bands back; same as the first time
13. Repeat Step 2-12 for 4 other plants
14. Do this for 3 days
Average oxygen produced per second (total of one minute)
Average oxygen produced per second (total of 2 minutes)
The hypothesis supported the data, but not entirely. The most efficient light spectrum to increase the frequency of oxygen production is not both red and blue, but only blue. Red is also useful, but it is a lot less compare to blue.
"PHOTOSYNTHESIS." Estrella Mountain Community College. Web. 09 May 2010. <http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookPS.html>.