How radiation affects temperature

• What happens to an object when it absorbs electromagnetic radiation?

  It gets warmer.
• How does emitting radiation affect an object's temperature?

  It cools down the object.
• What is the relationship between absorbing and emitting radiation and an object's temperature?

  The balance affects the object's temperature; more absorption leads to warming, while more emission leads to cooling.
• What happens to a hotter object like a cup of tea compared to its surroundings in terms of radiation?

  It emits more radiation than it absorbs, leading to energy loss and cooling down.
• How does an ice cube behave in terms of radiation compared to its surroundings?

  It emits less energy than it absorbs, causing it to warm up.
• What occurs when an object absorbs and emits the same amount of energy?

  It stays at the same temperature.
• What does the term intensity refer to in the context of electromagnetic radiation?

  It is the power of the radiation per unit area.
• How can intensity be graphically represented in relation to emitted radiation?

  By plotting wavelength on the x-axis and intensity on the y-axis.
• Which types of radiation are primarily considered in this topic?

  Ultraviolet radiation, visible light, and infrared radiation.
• What does the curve of emitted radiation for a room temperature object like a paper bag look like?

  It shows most energy emitted in the infrared range with low overall radiation.
• How does the emitted radiation curve change for a hotter object like burning coal?

  The curve shifts up and to the left, indicating more overall radiation and shorter wavelengths emitted.
• What happens to the emitted radiation curve for an even hotter object like the sun?

  The curve shifts further up and left, indicating even more radiation and shorter wavelengths emitted.
• What is the effect of increasing temperature on the intensity of emitted wavelengths?

  As temperature increases, the intensity of every emitted wavelength also increases.
• What type of radiation do objects at room temperature primarily emit?

  Infrared radiation.
• Why does the color of a Bunsen burner flame change as it gets hotter?

  Because shorter wavelengths of light are emitted as the flame temperature increases.
• How does the Earth's temperature balance relate to radiation absorption and emission?

  During the day, more energy is absorbed than emitted, increasing temperature, while at night, less energy is absorbed than emitted, decreasing temperature.
• What role does the Earth's atmosphere play in radiation absorption and emission?

  It reflects, absorbs, and emits radiation, affecting the overall temperature balance.
• Why does the overall temperature of the Earth remain relatively constant despite day and night cycles?

  Because some parts of the Earth are always in sunlight, maintaining a consistent temperature overall.
• What are the key concepts related to the absorption and emission of electromagnetic radiation?

  • Absorption increases temperature.
  • Emission decreases temperature.
  • Balance affects temperature stability.
  • Intensity is power per unit area.
  • Wavelengths emitted depend on temperature.
• What is the significance of the emitted radiation curve for different temperatures?

  • Room temperature objects emit mostly infrared radiation.
  • Hotter objects emit more radiation and shorter wavelengths.
  • The curve shifts up and left with increasing temperature.
  • Color changes in flames indicate temperature changes.
• How does the Earth's radiation balance affect its temperature throughout the day?

  • Daytime: More energy absorbed than emitted, increasing temperature.
  • Nighttime: Less energy absorbed than emitted, decreasing temperature.
  • Atmosphere plays a role in reflecting, absorbing, and emitting radiation.
  • Overall temperature remains relatively constant due to sunlight exposure.