A) allow shorter wavelength to enter earth's atmosphere while doesn't allow longer wave-length to leave the earth's atmosphere.
B) allow longer wavelength to enter earth atmosphere while doesn't allow shorter wave-length to leave the surface
C) do not have wavelength specific character.
D) show wavelength specific behaviour near the earth while far from earth these have wavelength independent behaviour.
Correct Answer: A
Solution :
[a] Radiation coming from sun or outerspace have high energy or short wavelength, which are allowed to enter by green house gases. However, radiation emitted by earth is in infrared region, having long wavelength, are reflected back by the envelope of green house gases.
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