The law of conservation of energy states that energy can neither be created nor be destroyed, but it can be transformed from one form to another.
So I considered an example of it as follows: water is stored at height with potential energy, the water flows and its potential energy is converted into kinetic energy. It flows to rotate a turbine with mechanical energy. Then the kinetic energy is converted into electrical energy. In our house the electrical energy is converted into luminous energy, heat energy, and so on.
But what happens after that?
Best Answer
Law of conservation of energy states that, Energy in the isolated system remains constant.
Now, for the conversions you have provided, light energy is nothing but collection of electromagnetic waves. These waves carry energy proportional to their frequency. Light gets reflected, transmitted or absorbed. In case of absorption there is conversion of energy. The constituting atoms or molecules vibrate, translate or rotate with greater energy which they get from incident light. This increased energy in object can be stored or given out in some form.
Heat transfer occurs by convection, conduction or radiation. For radiation, same as light. Similarly, transfer of heat energy by convection or conduction is microscopic and depends on object receiving, whether to store or give out this energy in different form.