Multiple choice

Which wave is used in green house to keep plants warm?

  1. Gamma ray

  2. Micro waves

  3. Infrared waves

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Greenhouses use infrared radiation from the Sun to warm plants and soil. The glass allows visible light to pass through, which is absorbed by plants and converted to heat. This heat is then re-radiated as infrared radiation, which glass traps effectively. Microwaves and gamma rays are not significant for greenhouse warming.

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