Heat radiation Flashcards
Heat is transferred by…
- Radiation
- Conduction
- Convection
What is heat radiation
The transfer of heat energy by infrared radiation
What is the transfer of energy by particles
Conduction and convection
Conduction is the main form of …
Heat transfer in solids
Convection is the main form of…
Heat transfer in liquids and gases
What can infrared be emitted by
Solids, liquids and gases
What can any object absorb and emit
Infrared radiation whether convection or conduction is happening
The bigger the temperature difference between a body and its surroundings
The faster energy is transferred by heating
What is infrared radiation
Emission of Electromagnetic waves
All objects are…
Continually emitting and absorbing infrared radiation
How is infrared radiation emitted
From the surface of an object
An object that’s hotter than its surroundings
Emits more radiation than it absorbs (as it cools down)
An object that’s cooler than its surroundings
Absorbs more radiation that it emits (it warms up)
The hotter the object the..
More radiation it radiates in a given time
How can you feel infrared radiation
By standing near something hot (e.g. a fire) and put your hand on the bonnet of a recently parked car
