Solar energy at normal incidence outside the earth's atmosphere is about:
Correct answer: C. 1.4 kWm-2
- A. 2.5 kWm-2
- B. 0.6 kWm-2
- C. 1.4 kWm-2
- D. 2.0 kWm-2
Explanation
Explanation:Solar energy at normal incidence outside the Earth's atmosphere is also known as solar constant. The solar constant is the amount of solar radiation per unit area that falls on a surface that is perpendicular to the Sun's rays when the Earth is at an average distance from the Sun. The value of the solar constant is about 1.4 kWm-2. This energy value is the amount of energy that would be received per unit area outside the Earth's atmosphere when the sun is at its zenith.
This question appeared on the UHS MDCAT 2009 paper, which you can sit online with every answer explained.
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