The First law Of Thermodynamics

It states that the amount of energy in the universe is constant. It may change from one from to another, but it can neither be created nor destroyed. Light energy can neither be created nor be destroyed as it passes through the atmosphere. It may, however, be transformed into another type of energy, as chemical energy or heat energy. These forms of energy can be transformed into electromagnetic radiation which is the sum total of increase in the internal energy and work done.

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