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Q33 (CAPF/2024) Environment & Ecology › Climate Change & Global Initiatives › Climate science and impacts

Which one of the following statements with regard to greenhouse effect is correct?

Result
Your answer: —  Â·  Correct: C
Explanation

The greenhouse effect is based on the selective permeability of certain materials to different wavelengths of radiation. In a glass chamber, the glass is transparent to incoming short-wave solar radiation, which includes visible light and near-infrared wavelengths [1]. Once this energy is absorbed by internal surfaces like soil or plants, it is re-emitted as long-wavelength thermal infrared radiation [1][2]. Glass is relatively opaque to these longer wavelengths, effectively trapping the heat inside the chamber [1]. This mechanism is analogous to how greenhouse gases in the atmosphere, such as carbon dioxide and water vapor, allow short-wave radiation to enter but absorb and re-emit outgoing long-wave radiation, preventing it from escaping into space [2][4]. Consequently, the temperature inside the chamber or the lower atmosphere rises due to this trapped thermal energy [3][4].

Sources

  1. [1] FUNDAMENTALS OF PHYSICAL GEOGRAPHY, Geography Class XI (NCERT 2025 ed.) > Chapter 11: World Climate and Climate Change > Global Warming > p. 96
  2. [2] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 6: Environmental Degradation and Management > Greenhouse Effect and Global Warming > p. 7
  3. [4] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 7: Climate Change > 2. greenhouse gases > p. 9
  4. [3] Environment, Shankar IAS Acedemy .(ed 10th) > Chapter 17: Climate Change > Role of Greenhouse Gases > p. 255
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