When a television is working, multiple sorts of energy transformation are simultaneously occurring. Electrical signals are transmitted from the base station to the television, where they are converted into light, heat, and sound energy. According to the law of conservation of energy, energy can change from one form to another, but it cannot be created or destroyed. The amount of energy contained within the Earth’s closed system is constant. In the majority of conversions, some energy is converted to heat energy, meaning that at least a portion of the television’s electricity is released into the environment.
The conversion of electrical energy into other forms has always entailed a degree of risk, especially in terms of heat energy. When heat energy cannot escape, it can cause damage to interior components and potentially pose a fire hazard. This is why the majority of electrical equipment include a cooling fan or other mechanism for removing interior heat. The television’s internal components use electricity to convert the signal arriving from the cable or through the wire from the satellite dish or another device into light and sound, organising the light into predetermined patterns that display the programme to the viewer.