Give the distance between consecutive nodes and antinodes in terms of wavelength $\lambda$.

(N/A) In a stationary wave,the distance between two consecutive nodes is $\frac{\lambda}{2}$.
Similarly,the distance between two consecutive antinodes is $\frac{\lambda}{2}$.
The distance between a node and its consecutive antinode is half of the distance between two consecutive nodes.
Therefore,the distance between a consecutive node and antinode is $\frac{1}{2} \times \frac{\lambda}{2} = \frac{\lambda}{4}$.