Fermentation is a chemical process that involves the breakdown of carbohydrates anaerobically by the activities of microorganisms.
It is the process use in the production of foodstuffs, wine and beer. Fermentation start with enzymes activities, which breakdown sugars into lactate or two molecules of three carbon organic acid, pyruvic acid. Pyruvate is reduced to lactic acid or alcohol in the absence of oxygen and nicotinamide adenine dinuleotide+hydrogen(NADH) is oxidized . This process produces two ATP per glucose molecule.
Light is a form of EM radiation. EM radiation has no mass (it's just energy packets called photons). EM radiation can travel through a vacuum. (The speed of light in a vacuum is called c and is around 300,000 m/s).
