in the light reactions light energy is used to oxidize

takes place only in the presence of sunlight. In this reaction, the light energy from the sun is absorbed by the photosynthetic pigments and is used to break down the water molecules. This is called the photolysis ('photo' is light and 'lysis' ref..

In this stage, the light is absorbed by the chlorophyll pigments and is used to split water into hydrogen and oxygen. Oxygen is released as by-product. Photolysis produces energy which is used in the Calvin cycle that follows. The energy is tempora..

In the presence of air or light chloroform is slowly oxidized into a poisonous compound phosgene (carbonyl chloride)...

Scattering of Light - When light passes through a substance or gas, a part of it is absorbed and the rest scattered away. The basic process in scattering is absorption of light by the molecules followed by re-radiation in different directions. The strength of scatterin..

In this stage, water and carbon dioxide are used to form carbohydrates. This is done with the help of a carbon acceptor - Ribulose Diphosphate (RuDP). Calvin cycle produces sugar molecules and regenerates the carbon acceptor which then enters another cycle. The hydrogen atoms set free du..

Summary - Light is a form of energy which can be reflected either by a plane mirror or spherical mirror. Depending upon the type of mirror used for reflection of light the use of reflecting surface also varie..

) gets positively charged due to the deficiency of electrons. When a metallic wire connects the two electrodes, the electrons flow from the negatively charged electrode to the positively charged electrode. Thus, in an indirect redox reaction, electrons flow in a particular direction throu..

Summary - Some high fat foods such as potato chips are packaged in materials that protect them from light and oxygen and the containers are flooded with nitrogen to further exclude oxygen At times, to avoid the presence of oxygen altogether, vacuum packaging is used in some proc..

Judicious use of Energy - In order to live and enable ourselves to do everyday work we need energy. The prosperity of a country depends upon the availability of energy. Huge amount of electrical energy is used to run the air conditioners, ..

Energy for life processes basically comes from the sun. During photosynthesis, green plants absorb energy from the sun to make glucose and oxygen from carbon dioxide and water. Photosynthesis is a complex process which occurs in a sequence of steps leading to the net reacti..