Effect of Light on photosynthesis:
A. Hypothesis
1. Recall the chemical equation that represents photosynthesis if the spinach leaf is photosynthesizing do you expect to see the carbon dioxide level in the air around the leaf increase, decrease, or stay the same? Increase
2. Given what you know and learned during the chromatography of spinach pigments experiment, under what color light will the rate of photosynthesis be the greatest? Under what color light will the rate of photosynthesis be the lowest? Why
White light is the greatestas it is a spectrum of all light colors so it is not limited it can process through every color.
Green would be the lowest as it already processes green from being green so it does not absorb it.
(I am not sure if these answers are correct so if corrections are needed please make them)
***Table 1 effect of light on photosynthesis***
* Light Color: White – Initial CO2 (PPM): 1209 – Ending CO2 (PPM): 1260 – Change in CO2 (PPM) (initail-ending): 51 – Duration (min): 3 min – Net photosynthesis (PPM CO@/min)(change/duration): 51CO2/3min/17 CO2/min
* Light Color: Red – Initial CO2 (PPM): 1268- Ending CO2 (PPM): 1300 – Change in CO2 (PPM) (initail-ending): 38 – Duration (min): 3 min – Net photosynthesis (PPM CO@/min)(change/duration): 12.6 CO2/ min
* Light Color: Green – Initial CO2 (PPM): 1303- Ending CO2 (PPM): 1333 – Change in CO2 (PPM) (initail-ending): 30 – Duration (min): 3 min – Net photosynthesis (PPM CO@/min)(change/duration): 10 CO2/ min
* Light Color: White#2 – Initial CO2 (PPM): 1234- Ending CO2 (PPM): 1290 – Change in CO2 (PPM) (initail-ending): 56 – Duration (min): 3 min – Net photosynthesis (PPM CO@/min)(change/duration): 18 CO2/ min
* Light Color: Red#2 – Initial CO2 (PPM): 1265 – Ending CO2 (PPM): 1292 – Change in CO2 (PPM) (initail-ending): 27 – Duration (min): 3 min – Net photosynthesis (PPM CO@/min)(change/duration): 9 CO2/ min
* Light Color: Green#2 – Initial CO2 (PPM): 1255 – Ending CO2 (PPM): 1282 – Change in CO2 (PPM) (initail-ending): 27 – Duration (min): 3 min – Net photosynthesis (PPM CO@/min)(change/duration): 9 CO2/ min
* Light Color: White#3 – Initial CO2 (PPM): 1201 – Ending CO2 (PPM): 1247 – Change in CO2 (PPM) (initail-ending): 46 – Duration (min): 3 min – Net photosynthesis (PPM CO@/min)(change/duration): 15.3 CO2/ min
* Light Color: Red#3 – Initial CO2 (PPM): 1219 – Ending CO2 (PPM): 1207 – Change in CO2 (PPM) (initail-ending): 12 – Duration (min): 3 min – Net photosynthesis (PPM CO@/min)(change/duration): 4 CO2/ min
* Light Color: Green#3 – Initial CO2 (PPM): 1201 – Ending CO2 (PPM): 1201 – Change in CO2 (PPM) (initail-ending): 0 – Duration (min): 3 min – Net photosynthesis (PPM CO@/min)(change/duration): 0 CO2/ min
