Question

⇒ During greenhouse effect, are infrared radiations of shorter wavelength or infrared radiations of longer wavelength radiated by earth’s surface?

Answer 1

Water vapor , carbon dioxide , methane , and other trase gases in Earth's atmosphere absorb the longer wavelengths of outgoing infrared radiation from Earth's surface . These gases than emit the infrared radiation in all directions , both outward toward space and downward toward Earth .

Answer 2

Water vapor, carbon dioxide, methane, and other trace gases in Earth's atmosphere absorb the longer wavelengths of outgoing infrared radiation from Earth's surface. These gases then emit the infrared radiation in all directions, both outward toward space and downward toward Earth. This process creates a second source of radiation to warm to surface – visible radiation from the sun and infrared radiation from the atmosphere – which causes Earth to be warmer than it otherwise would be. This process is known as the natural greenhouse effect and keeps Earth's average global temperature at approximately 15°C (59°F).