What is the cause of Green house effect? (a) infra-red rays (b) ultra violet rays (c) X-rays (d) radio waves.

Answer: (a). Earth's surface re-radiates absorbed sunlight as infrared. Greenhouse gases ( CO₂, water vapour) trap this infrared and warm the Earth. So the answer is (a) infra-red rays.

What is the cause of Green house effect? | NEET 2002 (AIPMT)

Q39NEET 2002 · AIPMTEasy

Electromagnetic Spectrum & Atmosphere

What is the cause of Green house effect?

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Answer: (a)

Earth's surface re-radiates absorbed sunlight as infrared.
Greenhouse gases ( $\text{CO}_2$ , water vapour) trap this infrared and warm the Earth.
So the answer is (a) infra-red rays.

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