GKFix MCQ Question

What is the wavenumber of a wave with a wavelength of 400 nm?

• A. 1.5 × 10⁴ cm⁻¹
• B. 2.0 × 10⁴ cm⁻¹
• C. 2.5 × 10⁴ cm⁻¹
• D. 3.0 × 10⁴ cm⁻¹