Infrared Radiation and Black Body Radiation Quiz
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5 questions, one answer each
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1. Which of the following statements about infrared radiation is correct?
- A. All bodies at any temperature emit and absorb infrared radiation
- B. Only hot objects emit infrared radiation; cold objects do not
- C. Infrared radiation is only emitted by objects hotter than 100°C
- D. Only black surfaces can emit infrared radiation
2. A perfect black body differs from other surfaces because it:
- A. Emits radiation only in the infrared region of the spectrum
- B. Is an ideal absorber and emitter of radiation at all wavelengths
- C. Does not emit any radiation at room temperature
- D. Reflects all the radiation that falls on it
3. The rate at which a body emits infrared radiation depends on which two factors?
- A. Its colour and the time of day
- B. Its temperature and surface properties
- C. Its mass and distance from the Sun
- D. Its volume and chemical composition
4. The Earth's temperature remains relatively stable because:
- A. The atmosphere prevents all radiation from escaping to space
- B. The rate of radiation absorbed from the Sun equals the rate of radiation emitted by Earth
- C. The Sun's output of energy is constant throughout the year
- D. Greenhouse gases completely block infrared radiation
5. How does increased atmospheric carbon dioxide concentration enhance the greenhouse effect? (Higher Tier)
- A. It increases the amount of solar radiation reaching Earth's surface
- B. It absorbs more of the infrared radiation emitted by Earth and re-emits some back to the surface, increasing surface temperature
- C. It reflects visible light from the Sun back into space
- D. It reduces the rate at which Earth emits infrared radiation to space