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Simply explain the absorption spectrum:

Lets start with the absorption spectrum first (image from the Wikipedia page in ):

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It helps in a wider scope of absorption of light for photosynthesis.

Absorbancy changes (390–600 mμ) in the purple sulfur bacterium Chromatium have been studied by means of a double-beam spectrophotometer. Irradiation of anaerobic bacteria with near infrared causes the oxidation of at least four cyt...

The separated pigments were then analyzed for their absorption spectrum using a spectrographometer.

Chlorophylla-a is the primary for in plants. Its structure is shown at left. It has the composition C55H72O5N4Mg. It exhibits a grass-green visual color and absorption peaks at 430nm and 662nm. It occurs in all photosynthetic organisms except photosynthetic bacteria.

ATR absorption spectra, from []

Current understanding is that the earliest photosynthetic organisms were aquatic bacteria, some of which are still around today. One of these, halobacterium halobium, grows in extremely salty water. It makes use of the bacteriorhodopsin pigment. The chlorophyll system developed to use the available light, as if it developed in strata below the purple bacteria and had to use what it could get.

But what about the development of land plants? Why did they stay green? The thoughts are that they had plenty of light and were not pressured to develop more efficient light gathering. That is, the light was not the limiting resource in photosynthesis for plants.

Action & Absorption Spectra - Biology Pages

Since from further reading I learn that plants can use all the light in the visible spectrum for photosynthesis, I'm wondering (my questions >>):

First thing to note is that the absorption spectrum of chlorophyll A and chlorophyll B is similar but not the same. The reason for the appearance of absorption spectra is because the light is composed of photons of light. Different photon has different oscillation frequency and energy. The essence of Chlorophyll absorption is absorbing photons. After chlorophyll absorption of a photon, the electron transition from the ground state to the excited state, and get water electronic from the water cause decomposition. Only phonton that has resonant vibration frequency with electrons, and can meet the energy requirements of electronic transitions in order to be absorbed by chlorophyll. The Photon energy of different wavelengths of light is different. This is also the reason of different wavelengths of light affect chlorophyll light absorption.

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  • Action & Absorption Spectra in Photosynthesis - …

    In physics, absorption factors refer to the full spectrum of radiation.

  • Water Absorption Spectrum - London South Bank …

    We in the solar field are referring to absorption over a specific spectral range of sunlight here on earth.

  • The water absorption spectrum is very complex

    Peak absorption by chlorophyll occurs, and a strong influence on photosynthesis.

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The Absorption Spectrum of Chlorophyll :: Papers

Changes in Absorption during Photosynthesis in the Ultra-violet SpectrumSEVEN different types of changes in absorption between 400 and 800 mµ and with lifetimes between 10 −5 and 10 −2 sec. have been found in connexion with photosy...

10/01/2018 · The Absorption Spectrum of Chlorophyll ..

Studies on the primary process in photosynthesis. II. Some relationships between light-induced absorptionspectrum changes and chemiluminescence during photosynthesisPhotosynthesis1. 1. Photosynthetically active light has been shown t...

An absorption spectrum shows which wavelength of light a molecule ..

Abstract The comparison of light-induced absorption changes in photosynthesis with electrochromic spectra of the isolated pigments in vitro is renewed m...

1 Difference between absorption action spectrum

Absorption-spectrum changes caused by illumination in photosynthetic purple bacteria, Rhodopseudomonas spheroides (wild type and blue-green mutant), Rho...

1 What Are Action and Absorption Spectra

THE CONTINUOUS ABSORPTIONSPECTRUM OF THE CONTINUOUS ABSORPTIONSPECTRUM OF CHLORINE AND THE PHOTOSYNTHESIS OF Received 27th May, 1937. Recent work, 1~ 2, has led to the following interpretation of the continuous absorptionspectrum o...

Photosynthesis Absorption Spectrum For Chlorophyll

ABSTRACT A new approach that uses a combination of semiempirical configuration interaction method and exciton theory to calculate electronic energies, eigenstates, absorptionspectrum and circular dichroism (CD) spectrum of the LH2 a...

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