how are light and chemical energy related in photosynthesis? Your help would be great!?

Answer 1

Light of a certain wave-length is absorbed by chlorophyll. It brings an electron from a ground state to an excited state, *e. Then it goes down an electron chain, transferring its energy to a system of enzymes that uses it in the "synthesis" of ATP from ADP. This electron is finally captured by the oxygen of H2O that becomes O2 and is released in the environment.
ATP is the chemical energy currency of the cell to do work. And ADP is its uncharged form.

So:
1. Light hits
2. electron in ground state in chlorophyll -> *e
3. *e -> electron down to oxygen forming O2
4. energy liberated by the fall of *e is captured by enzymes
5. enzymes use it to form ATP (chemical energy) from ADP.

Answer 2

How much time do you have? Entire courses in graduate school are devoted to this subject so it depends on how detailed an answer you want. :)
To put it very simply, photosynthesis uses light energy to split water and carbon dioxide to form glucose (or sugar), with oxygen as a byproduct. Glucose can be utilized by plants, and the animals that eat them, to provide energy. So chemical energy (glucose), cannot be formed without the input of light energy.

Answer 3

you ask an interesting question. I guess I'll have to answer it just like the rest of the experts here on yahoo answers.

Light is being used as photosyntesis to make sugar and used and stored as energy. Light energy which is used to synthesize energy is stored at night so plant cells can utilize it during the night to give off oxygen as waste while carbon dioxide also is processed when taken in at exaclty the same process of oxygen being dispelled. Higher level course in molecular biology cover this sort of topic extensively. If you're studying this in college right now, good for you. There's tons and tons of information needed to be absorb by you to completely appreciate what cells and biology is all about. Good enough, yes?

Answer 4

CO2 + H2O + Energy from light --> C6H12O6 + O2 (chemical equation not balanced) shows that a combination of chemical energy from the break down and reformation of molecules is all powered by light in photosytnthesis.

Answer 5

A photosynthetic reaction in chlorophyll uses light energy to reduce the molecule NAD into the energy storing molecule NADH via an electron transport chain mechanism. Then, carbon dioxide (1-carbon molecule) is absorbed from the atmosphere. The energy stored in the NADH molecule is used to synthesize glucose (6-carbon molecule) from the carbon dioxide (1-carbon molecules).

Answer 6

http://en.wikipedia.org/wiki/Photosynthesis

Photosynthesis uses the energy of light to make the sugar, glucose. A simple general equation for photosynthesis follows.

carbon dioxide + water + light energy → glucose + oxygen + water


(note from another site with detailed pictures of the workings of a leaf...
"six molecules of water plus six molecules of carbon dioxide produce one molecule of sugar plus six molecules of oxygen"

http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookPS.html )

Photosynthesis occurs in two stages.
--------- In the first phase light-dependent reactions or photosynthetic reactions (also called the Light reactions) capture the energy of light and use it to make high-energy molecules.
----------During the second phase, the light-independent reactions (also called the Calvin-Benson Cycle, and formerly known as the Dark Reactions) use the high-energy molecules to capture carbon dioxide (CO2) and make the precursors of glucose.

hit the website for more details!!

hope I helped
-dawgy

Answer 7

light activates the chloropasts which produce chemical energy which is what feeds the plant