C1.3.6 Action and Absorption Spectra
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7 Terms
What is the absorption spectra?
a graph that shows the percentage/ amount of light absorbed by a photosynthetic pigment at each wavelength of ligth
What is the action spectra?
a graph that shows the (relative) rate of photosynthesis at each wavelength of light
What is shown on the y-axis of the absorption spectra?
the amount of light absorbed
units: percentages, SI units, or Arbitrary units (AU, which is the relative logarithmic ratio of light absorbed)
What is shown on the y-axis of the action spectra?
the relative rate of photosynthesis
how is the relative rate of photosynthesis derived in the action spectra?
from the rate of O2 production or CO2 consumption
What is shown on the x-axis of the two spectra, and what is its unit and range?
wavelengths of light (nm), 400-700(nm)
Why do we only show a range of 400-700nm of light?
because photosynthesis can only occur in these specific wavelengths were light can be absorbed