Heat Transfer

Radiation is one type of heat transfer. Radiation is the is thermal transfer of heat from electromagnetic waves. The radiative energy can transfer through air, without any contact. For example, in a microwave we can eat up the food without anything touching it. This is because of heat inside the microwave is transferring electromagnetic waves to the food, making it warm and hot.

Conduction is the type of heat transfer where the object is in direct contact with the heat. Conduction occurs when a substance is heated and gains more energy. This causes the substance to move around quickly and ends up touching the  object, transferring the heat.

An example of an item that involves conduction is a frying pan. When you fry food with a pan, the heat under transfers to the food, which heats it up and makes it sizzle and move.

Convection is a type of heat transfer by movement of a fluid such as air or water when the heated fluid is caused to move away from the source of heat, making it less dense.

For example, if I come back from exercising and go to someone’s rooms where they’re cold, the person and feel the heat I transferred through the air. The difference between convection and radiation is that radiation doesn’t need any requirements and it uses heat waves.