The best wavelengths of visible light for photosynthesis fall within the blue range (425–450 nm) and red range (600–700 nm) . Therefore, the best light sources for photosynthesis should ideally emit light in the blue and red ranges.
What color of light is most effective in driving photosynthesis and why?
Red light is more effective in photosynthesis because both the photosystems (PS I and PS II) absorb light of wavelengths in the red region (680 and 700 nm, respectively). Furthermore, blue light is absorbed by carotenoids, which pass the energy to the chlorophyll.
Which light of action spectrum is most effective in driving photosynthesis?
The areas of the spectrum that drive photosynthesis are highest in the red end (600-700 nm), followed by the blue region (400-500 nm) and lastly, the green region (500-600 nm). These data show that between 50 and 75% of the green light is used in photosynthesis. Thus, Green light is necessary for photosynthesis.
Which part of light is effective in photosynthesis?
Red light is more effective in photosynthesis because both the photosystems (PS I and PS II) absorb light of wavelengths in the red region (680 and 700 nm, respectively). Furthermore, blue light is absorbed by carotenoids, which pass the energy to the chlorophyll. Light in the red region is absorbed by chlorophyll.
Why is visible light the most effective in driving photosynthesis?
An action spectrum plots the rate of photosynthesis at various wavelengths of visible light, and it shows that blue light with a wavelength of about 490 nm is effective in driving photosynthesis. ... b) These pigments are able to absorb more wavelengths of light ( and thus more energy) than chlorophyll a alone can absorb.
Which wavelengths of light drive the highest rate of photosynthesis select the two best answers?
*Which wavelengths of light drive the highest rates of photosynthesis? Select the two best answers. Light in the violet-blue and red portions of the spectrum is most effective in driving photosynthesis.
What wavelength of light does blue absorb?
The electromagnetic spectrum ranges from high-energy cosmic rays (high frequency, short wavelength) to very low-energy microwaves (low frequency, long wavelength). Visible light represents a very narrow section of this range with wavelengths between 400 nanometers (nm) for blue light to around 700 nm for red light.
What absorbs more light?
The more light the object absorbs, the more heat absorbed since light is energy. If you consider it a color, black absorbs the most heat. A black object absorbs all wavelengths of light and reflects none. Objects that are white, on the other hand, reflect all wavelengths of light and therefore absorb the least heat.
Why is red light most effective in photosynthesis?
The primary reasons why LED fixtures emit a lot of red are 1) red LEDs are among the most efficient at converting electricity into photosynthetic photons, 2) chlorophyll strongly absorbs red light , thus it is effective at photosynthesis, and 3) red LEDs are relatively inexpensive.
Which light range is least effective in photosynthesis?
In the visible spectrum green light is the least efficiently used color. The wavelength of green light ranges from 495 – 570 nm. The frequency of green light is 5.45 (104 Hz). From the above information we have found that green light range is least effective in photosynthesis.
In which light photosynthesis is maximum?
In order to absorb the blue color of light in the greatest quantity, the maximum intensity of photosynthesis occurs in red light . So, the correct answer is, ‘Red light'. Note: Chlorophyll is a green-colored pigment that in plants absorbs light for photosynthesis.
Is blue or red light better for photosynthesis?
light. In contrast, blue light is considered equally effective as green or red light at driving photosynthesis . Thus, while blue light can appear somewhat dim to us, it has high energy and is useful for plant growth applications.
What does not affect the rate of photosynthesis?
Photosynthesis is affected by light, temperature, water, and CO2. Stomata affect the process of transpiration and do not affect photosynthesis.
Why do plants absorb red and blue light?
12. Short answer: plant absorbs mostly “blue” and “red” light. ... To do this, plants have pigment molecules which absorb the energy of light very well . The pigment responsible for Page 7 most light-harvesting by plants is chlorophyll, a green pigment.
Is red light effective in driving photosynthesis?
Because the absorption spectra of the pigments are highest in the purple/blue wavelengths, we can assume that red light is not effective . c. One cannot tell from this graph, but because chlorophyll a does absorb red light, we can predict that it would be effective in driving photosynthesis.
What light does a 430nm pigment absorb?
– A 430nm pigment likely absorbs blue light .
