The Raman shift, related to force constant k and reduced mass μ, is given by ________

• A. \(\frac{1}{2π}\sqrt{\frac{k}{μ}}\)
• B. \(\frac{1}{2πc}\sqrt{\frac{k}{μ}}\)
• C. \(\frac{1}{2π}\sqrt{\frac{μ}{k}}\)
• D. \(\frac{1}{2πc}\sqrt{\frac{μ}{k}}\)