GKFix MCQ Question

What is the frequency range of red light?

• A. 4.6 to 5.0 × 10¹⁴ Hz
• B. 5.0 to 5.2 × 10¹⁴ Hz
• C. 4.3 to 4.6 × 10¹⁴ Hz
• D. 5.2 to 5.5 × 10¹⁴ Hz