Multiple choice

Which rays are trapped in the earth’s atmosphere during the greenhouse effect?

  1. UV rays

  2. Visible rays

  3. Radio waves

  4. IR rays
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Water vapours and certain gases in the atmosphere absorb infrared radiations, causing what is called the greenhouse effect. These infrared radiations come from materials on the earth's surface that have been heated by sunlight. These absorbed infrared radiations heat up the atmosphere. 

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