Question

Study carefully the following figure representing greenhouse effect.
Select the correct statements regarding this.

• A. Much of the long wavelength infrared radiations reradiated by the earth's surface are absorbed by the atmospheric greenhouse gases.
• B. ${CO}_2,{CH}_4,{CFC}_s$ and $N_{2}O$ are the gases which are responsible for greenhouse effect.
• C. The atmosphere is transparent to the incoming short-wavelength radiations and is translucent to the long-wavelength infra-red radiations.
• D. All of these

Answer 1

Answer: (D)

All of these

The greenhouse effect is a natural process that warms the Earth’s surface. When the Sun’s energy reaches the Earth’s atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases. Greenhouse gases include water vapour, carbon dioxide, methane, nitrous oxide, ozone and some artificial chemicals such as chlorofluorocarbons (CFCs). Earth receives energy from the Sun in the form of ultraviolet, visible, and near-infrared radiation. About 26% of the incoming solar energy is reflected to space by the atmosphere and clouds, and 19% is absorbed by the atmosphere and clouds. Most of the remaining energy is absorbed at the surface of Earth.The absorbed energy warms the atmosphere and the surface of the Earth. This process maintains the Earth’s temperature at around 33 degrees Celsius warmer than it would otherwise be, allowing life on Earth to exist.

So the correct option is 'all of these'.