GKFix MCQ Question

What is the wavenumber of a wave with a wavelength of 500 nm?

• A. 1 × 10⁴ cm⁻¹
• B. 2 × 10⁴ cm⁻¹
• C. 3 × 10⁴ cm⁻¹
• D. 4 × 10⁴ cm⁻¹