WAEC Physics 2021 Paper

Concept:A node and its adjacent antinode in a standing wave are separated by a quarter of the wavelength.Explanation:In a stationary wave, the distance between two successive nodes is $\frac{\lambda}{2}$.An antinode is located exactly midway between two neighbouring nodes.Therefore, the distance from a node to the adjacent antinode equals half of the node-to-node distance:$$\frac{1}{2} \times \frac{\lambda}{2} = \frac{\lambda}{4}$$Thus, the distance is one-quarter of the wavelength.Answer:D. quarter of the wavelength.