Question
The flow of energy shown in Figures 3 and 4 is the source of the natural "atmospheric greenhouse effect." Visible light penetrates the atmosphere and is absorbed by the surface. The heated surface gives off infrared light that is then absorbed by the atmosphere. The heated atmosphere gives off infrared light out to space and also back down to Earth's surface, making the surface temperature warmer than it would be without a greenhouse effect. The amount of energy entering and leaving the Earth system can be balanced, but Earth's surface temperature is warmer because the surface is heated both by visible light from the Sun and infrared light sent back from the atmosphere. Consider the following debate between two students regarding the greenhouse effect. So the greenhouse effect is caused by infrared light being trapped in Earth's atmosphere. Visible light from the Sun heats the ground, but the infrared light given off by the ground gets permanently trapped in the atmosphere and can never escape. I think that's close. But based on Figure 3, all of the arrows balance and just as much energy leaves Earth as comes in. I think the greenhouse effect makes the surface hotter than it would be without greenhouse gases because the ground gets visible light from the Sun AND infrared light given off by the atmosphere that is sent back to the surface. Do you agree or disagree with either or both of the students? Explain your reasoning.
Explanation / Answer
Ya i agree with first student,and not with second one.Because without greenhouse effect the earth would be much cooler than it now and it will be very difficult to live.