Which of the following irradiance values meets or exceeds the minimum requirement of 600 W/m^2 for solar panel inspection?

• A. 700 W/m^2
• B. 300 W/m^2
• C. 600 W/m^2
• D. 450 W/m^2

Answer: (C)

Understanding how thresholds work: for solar panel inspection you need at least 600 W/m^2 of irradiance. That means any value equal to or higher than 600 meets the requirement. The value 600 W/m^2 exactly satisfies the minimum, making it the clearest example of meeting the threshold. A higher value like 700 W/m^2 would also satisfy the requirement, but when asked to pick a single value that meets the minimum, 600 W/m^2 shows hitting the boundary precisely. Values below the minimum, such as 300 W/m^2 or 450 W/m^2, do not meet the requirement.