Which of the following is the value of the solar constant ?
- A1.6 kW/m²
- B1.4 kW/m²
- C1.2 kW/m²
- D1.8 kW/m²
Show answer and explanation
Correct answer: (b) 1.4 kW/m²
Explanation
The solar constant is the solar energy reaching one square metre at the top of the Earth's atmosphere, facing the Sun, each second. Its value is about 1.36 kW/m², so of the options 1.4 kW/m² is closest.
It varies slightly with the Sun's activity.