Question

2. Our experimentally derived "action spectrum" seemed at odds with our directly measured Absorbance Spectrum in that blue light is absorbed more than red light, yet our chloroplasts produced a higher rate of photosynthesis when exposed to red light than when exposed to blue light. This seems backwards. One variable that was out of our control was our source of white light. Our lamps were equipped with incandescent light bulbs. Research the emission spectrum (spectral output) of incandescent light bulbs, and include an image images of the emission spectra (spectral outputs) of incandescent bulbs versus natural daylight from the sun Compare the light bulb emission spectrum with the absorbance spectrum you generated for the extracted spinach leaf pigments (or the one shown in the Action Spectrum data analysis recording). Discuss how the incandescent light sources could have impacted your results, perhaps explaining discrepancies noted above. Provide the URL of any source(s) you use. (12 ots) ģ

Answer 1

Answer :) The sunlight spectrum has an almost equal share of blue and red light. Plants need little intensity of blue light to open their stomata. Red light is less energetic than blue light and that is why it activated chlorophyll molecules more. In the spectrum image, we can see that the incandescent bulb produces more spectrum of red light than the blue light. Therefore, the percentage of absorbance of blue light will be more than in red light. However, red-light, as usual, will cause more photosynthesis than in the blue light. Reference: Effects of Blue Light on Plants. (n.d.). Retrieved March 30, 2020, from https://gpnmag.com/article/effects-of-blue-light-on-plants/

Sunligh spectrum Relative intensity 500 Relative intensity Incandescent bulb spectrum

PLEASE RATE THE ANSWER