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Emission and absorption of infrared radiation

Waves and electromagnetic radiation • Black body radiation

Key concepts

What you'll likely be quizzed about

  • Emission of infrared radiation occurs when an object at a temperature above absolute zero releases energy as infrared radiation.
  • The amount of radiation emitted increases with temperature, following Stefan-Boltzmann Law, which states that the emitted radiation is proportional to the fourth power of the object's absolute temperature.
  • For example, a hot stove will emit more infrared radiation than a cooler object like a table.

Flashcards

Test your knowledge with interactive flashcards

Can all objects emit infrared radiation?

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Yes, all objects emit infrared radiation if their temperature is above absolute zero.

Key notes

Important points to keep in mind

All objects emit infrared radiation above absolute zero.

Higher temperatures lead to increased infrared emission.

Darker surfaces absorb infrared radiation better.

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