What is the angular wave number \( k \) for a harmonic wave whose wavelength is \( 3.14 \text{ cm} \)?

Angular wave number \( k = \frac{2\pi}{\lambda} = \frac{2 \times 3.1416}{0.0314 \text{ m}} \approx 200 \text{ rad m}^{-1} \) (using \( \lambda = 3.14 \text{ cm} = 0.0314 \text{ m} \)). Wait, \( \frac{2 \times 3.14}{0.0314} = 200 \). Let's check options: Option 2 is 200. Correct answer is 2.