alleryInfrared radiation keeps the Earth warm through which effect?
AThe gravity well effect
BThe greenhouse effect
CThe greenfield effect
DThe greyscale effect
Answer & Solution
Correct answer: B. The greenhouse effect
1. Infrared is absorbed and re-radiated by the atmosphere.
2. That trapping keeps the average temperature up.
3. Infrared radiation plays an important role in maintaining the Earth's warmth through the greenhouse effect.
4. So the answer is the greenhouse effect.
_Source: syllabus Physics Part I, Ch 8 'Electromagnetic Waves'_
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