Absorption, Emission and Temperature

• What are the three main concepts discussed in the material?

  Absorption, emission, and temperature
• How does temperature affect absorption and emission of radiation?

  Hotter bodies emit and absorb more radiation
• What happens to the infrared radiation emitted by hotter bodies?

  It radiates more in a given time
• How do the wavelengths of radiation differ between hotter and cooler bodies?

  Hotter bodies emit shorter wavelengths
• What happens to the temperature of a body when it absorbs radiation faster than it emits?

  The temperature of the body increases
• What must a body at constant temperature do regarding radiation?

  It must absorb and emit radiation at the same rate
• What is the relationship between temperature and infrared radiation emission?

  • Hotter bodies emit more infrared radiation
  • They emit shorter wavelengths
  • They radiate more in a given time
• What is required for a body to maintain a constant temperature in terms of radiation?

  • Absorb radiation at the same rate
  • Emit radiation at the same rate