Thermal energy is the heat that a body or system absorbs due to particle motion within the body or system. It is one of the different energy groups, where power basically refers to the capacity to do work.
In other words, thermal energy is the energy that an object or body possesses as a result of the movement of its constituent particles. Because of the random motion of its atoms and molecules, it is the total internal kinetic energy of an object.
Thermal energy are of three types.
- Convection and
Transfer of thermal energy involves transferring internal energy. Conduction, convection, and radiation are the three forms of thermal energy transfer. Conduction involves direct contact with molecules, convection involves moving hot particles, and the motion of electromagnetic waves involves radiation.