Q27 (CISF/2025) Environment & Ecology › Climate Change & Global Initiatives

Which one of the following radiations is absorbed by the greenhouse gases ?

Result

Your answer: — · Correct: C

Explanation

Greenhouse gases (GHGs) such as carbon dioxide (CO₂), methane (CH₄), and water vapor are largely transparent to incoming short-wave solar radiation. However, they are highly effective at absorbing outgoing long-wave thermal radiation, which is Infrared radiation.

When the Earth's surface is heated by the Sun, it re-radiates energy back into the atmosphere at longer wavelengths. GHGs absorb this infrared energy and re-emit it in all directions, including back toward the Earth's surface. This process traps heat in the atmosphere, known as the greenhouse effect. Ultraviolet rays (Option A) are primarily absorbed by the ozone layer in the stratosphere, while radio waves and sound radiation do not play a role in the atmospheric greenhouse effect.

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SIMILAR QUESTIONS

Consider the following statements regarding terrestrial radiation :

I. Insolation received by the Earth is in shortwaves.

II. The Earth's energy heats the atmosphere from below.

III. The shortwave radiation from the Earth is absorbed by the greenhouse gases.

Which of the statements given above are correct?

Which one, among the following atmospheir gases, filters out most of the ultraviolet radiation of the Sun?

Which one of the following statements is true with regard to a greenhouse ?

The shorter wavelength infrared radiations from the Sun can enter into the greenhouse while longer wavelength infrared radiations from the ground and the plants inside the greenhouse cannot pass back out through the glass.

The shorter wavelength infrared radiations from the Sun can enter into the greenhouse and the longer wavelength infrared radiations from the ground and the plants inside the greenhouse can also pass back out through the glass.

The shorter wavelength infrared radiations from the Sun cannot enter into the greenhouse while longer wavelength infrared radiations from the ground and the plants inside the greenhouse can pass back out through the glass.

No infrared radiation can pass through the glass of the greenhouse.

Presence of ozone in the atmosphere is important because it absorbs

Consider the following statements : Statement-I : The atmosphere is heated more by incoming solar radiation than by terrestrial radiation. Statement-II : Carbon dioxide and other greenhouse gases in the atmosphere are good absorbers of long wave radiation. Which one of the following is correct in respect of the above statements ?