GKFix MCQ Question

What is the maximum speed of photoelectrons emitted from caesium with 6 × 10¹⁴ Hz light?

• A. 2.1 × 10⁵ m/s
• B. 3.49 × 10⁵ m/s
• C. 4.2 × 10⁵ m/s
• D. 5.6 × 10⁵ m/s