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Atmospheric absorption (greenhouse gases): The Sun’s infrared radiation is strongly absorbed by which gases in the Earth’s atmosphere? Identify the key IR-absorbing constituents among the choices. Choose the correct option.

Q: Atmospheric absorption (greenhouse gases): The Sun’s infrared radiation is strongly absorbed by which gases in the Earth’s atmosphere? Identify the key IR-absorbing constituents among the choices. Choose the correct option.

Concept Earth’s atmosphere absorbs IR mainly due to water vapour and carbon dioxide (major greenhouse gases). Ozone is most important for absorbing UV, not IR.

Difficulty: Easy

Carbon dioxide
Water vapours
Carbon dioxide and water vapours
Ozone

Correct Answer: Carbon dioxide and water vapours

Explanation:

Concept
Earth’s atmosphere absorbs IR mainly due to water vapour and carbon dioxide (major greenhouse gases). Ozone is most important for absorbing UV, not IR.

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