Thermal radiation



The term thermal radiation may be new at GCSE, but that doesn’t mean that this is a topic to be afraid of.  As we’ll see, this type of radiation helps explain how thermal (infrared) imaging cameras work, why a hot poker glows red hot, and why the fine balance between the absorption and emission of radiation are so crucial to the future of the planet.

Please note that this video includes some higher tier-only content.

Key Words

absorption, infrared, electromagnetic spectrum, emission, atmosphere, temperature, greenhouse effect, global warming, thermal energy, heat energy, wavelength