## College Physics (4th Edition)

The distance between two adjacent nodes is $1.57~cm$
We can find the wavelength: $\lambda = \frac{2\pi}{k}$ $\lambda = \frac{2\pi}{2.0\times 10^2~rad/m}$ $\lambda = 0.0314~m$ $\lambda = 3.14~cm$ Note that $\frac{\lambda}{2} = \frac{3.14~cm}{2} = 1.57~cm$ The distance between two adjacent nodes is half of the wavelength, which is $1.57~cm$