Absorbing Radiation (Infrared & Black Body)

Cards (21)

  • What type of radiation do objects absorb and emit?
    Electromagnetic radiation
  • What happens to an object when it absorbs radiation?
    It gets warmer
  • What occurs when an object emits radiation?
    It cools down
  • How does the balance of absorbing and emitting radiation affect temperature?
    It determines the object's temperature
  • What happens to a hotter object like a cup of tea in terms of radiation?
    It emits more radiation than it absorbs
  • How does an ice cube behave in terms of radiation compared to its surroundings?
    It absorbs more energy than it emits
  • What happens when an object absorbs and emits the same amount of energy?
    It stays at the same temperature
  • What is the term used to describe the power of radiation per unit area?
    Intensity
  • What does intensity measure in terms of radiation?
    Energy transferred to a given area
  • What does a graph of emitted radiation show on the x-axis and y-axis?
    X-axis: wavelength; Y-axis: intensity
  • Which types of radiation are relevant for this topic?
    Ultraviolet, visible light, infrared
  • What would the emission curve of a room temperature object like a paper bag look like?
    It emits mostly in the infrared range
  • How does the emission curve change for a hotter object like burning coal?
    It shifts up and to the left
  • What happens to the intensity of emitted wavelengths as temperature increases?
    Intensity of all wavelengths increases
  • Why do bunsen burner flames change color as they get hotter?
    Shorter wavelengths of light are emitted
  • What type of radiation do objects at room temperature primarily emit?
    Infrared radiation
  • How does the Earth interact with electromagnetic radiation from the sun?
    It absorbs and emits infrared radiation
  • What happens to the Earth's temperature during the day?
    More energy is absorbed than emitted
  • What occurs to the Earth's temperature at night?
    Less energy is absorbed than emitted
  • Why does the overall temperature of the Earth remain constant?
    Some parts are always in sunlight
  • What are the key concepts related to the absorption and emission of radiation?
    • Objects absorb and emit electromagnetic radiation
    • Absorbing radiation warms objects
    • Emitting radiation cools objects
    • Balance affects temperature
    • Intensity measures power per area
    • Emission curves shift with temperature