GKFix MCQ Question

What is the energy of a 400 nm photon?

• A. 4.969 × 10⁻¹⁹ J
• B. 4.869 × 10⁻¹⁹ J
• C. 4.769 × 10⁻¹⁹ J
• D. 4.669 × 10⁻¹⁹ J