Calculating solar panel area and conversion efficiency Steps:

• Identify incident energy flux as 120 J/m² in 1 s.
• Note total light energy on panels is 20 J in 1 s, so area = 20 J / 120 J/m² = 0.17 m².
• Calculate efficiency as (electrical output / light input) × 100% = (12 J / 20 J) × 100% = 60%. Why B is correct:
• Matches area from total incident energy divided by flux and efficiency from output-to-input ratio per standard definitions. Why the others are wrong:
• A: Area 6.0 m² implies 720 J incident, exceeding given 20 J light energy; efficiency 17% ignores 12/20 ratio.
• C: Area 6.0 m² overestimates incident energy; 6.0% efficiency mismatches 12/20 calculation.
• D: Correct area but 17% efficiency wrongly uses different input ratio, not 12/20.

Final answer: B