What percentage of energy coming from the Sun is re-radiated towards the space?
30%
The question asks about the percentage of energy that is re-radiated back into space from the Sun's incoming energy. This is a typical inquiry related to the Earth's energy budget within the context of climate studies.
When solar energy reaches the Earth, it undergoes several interactions:
- Some of the solar radiation is immediately reflected back into space by clouds, atmospheric particles, or bright ground surfaces like ice and snow. This process is known as albedo.
- Some of the solar energy is absorbed by the Earth's surface, warming the planet.
- Earth re-emits energy in the form of infrared radiation back into space to maintain energy balance.
Approximately 30% of the incoming solar energy is reflected back into space. This fraction consists of reflections from clouds, atmospheric particles, and the Earth's surface. This is known as the Earth's albedo.
Therefore, the correct answer to the question is 30%.
Let's rule out the other options:
- 15% - This is incorrect as it underestimates the typical proportion of reflected solar energy.
- 50% - This is incorrect as it overestimates the reflected energy; only about half of this amount is actually reflected.
- 25% - This is incorrect as it is somewhat close to the correct answer but still not accurate.
This concept is crucial in understanding the Earth's climate system and energy balance processes.
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Largest amount of freshwater is present in :
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(b) The atmosphere is essential in maintaining the heat balance of the body.
(c) The heat and sunlight both pass through the atmosphere.
Which of the statements(s) given above is/are correct?
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Reason “R”: Environmental and social impact assessments are effectively opposite ends of the same spectrum.
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In which part of India, the tropical Western Ghats are situated?
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Which of the following best describes the mechanism of the greenhouse effect in earth's atmosphere?
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(a) Flood plains are close to rivers for transportation.
(b) The soils in the flood plains are usually fertile.
(c) The terrain in flood plains is found as flat.
Select the correct answer form the code given below:
Assertion (A): Sustainable development is critical to well being of human society.
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Choose the correct code:
Important Questions from Basics of Environment
Which of the following is not a component of human-made environment?
The Wild Life (Protection) Amendment Act, 2022 seeks to implement the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES). Which of the following statements is correct about CITES?
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2. Under CITES, plant and animal specimens are classified into five categories based on the threat to their extinction.
3. The Convention requires countries to regulate the trade of all listed specimens through permits.
4. It also seeks to regulate the possession of live animal specimens.
For a clear night and with windspeeds < 3 m/s, the atmosphere is
- Protecting nature and the wilderness for its own sake is referred as
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