<Dl> <Dd> x =...− 5 λ 4, − 3 λ 4, − λ 4, λ 4, 3 λ 4, 5 λ 4,...(\ displaystyle x = \;...- (5 \ lambda \ over 4), \; - (3 \ lambda \ over 4), \; - (\ lambda \ over 4), \; (\ lambda \ over 4), \; (3 \ lambda \ over 4), \; (5 \ lambda \ over 4), \; ...) </Dd> </Dl> <Dd> x =...− 5 λ 4, − 3 λ 4, − λ 4, λ 4, 3 λ 4, 5 λ 4,...(\ displaystyle x = \;...- (5 \ lambda \ over 4), \; - (3 \ lambda \ over 4), \; - (\ lambda \ over 4), \; (\ lambda \ over 4), \; (3 \ lambda \ over 4), \; (5 \ lambda \ over 4), \; ...) </Dd> <P> called the anti-nodes, the amplitude is maximum, with a value of twice the amplitude of the original waves . The distance between two consecutive nodes or anti-nodes is λ / 2 . </P> <P> Standing waves can also occur in two - or three - dimensional resonators . With standing waves on two - dimensional membranes such as drumheads, illustrated in the animations above, the nodes become nodal lines, lines on the surface at which there is no movement, that separate regions vibrating with opposite phase . These nodal line patterns are called Chladni figures . In three - dimensional resonators, such as musical instrument sound boxes and microwave cavity resonators, there are nodal surfaces . </P>

Which of the following does not affect the size of waves