Concept:Nodes are fundamental structural components of stationary (standing) waves.
Solution:- Let's evaluate the truth of each statement regarding nodes.
- A: True. Nodes are points of perfect destructive interference, so their displacement/amplitude is zero.
- B: True. By definition of a stationary wave, the nodal points are locked in place and do not travel.
- C: True. Fixed boundaries strictly constrain movement, guaranteeing a node forms there.
- D: False. A full wavelength encompasses two wave loops. Therefore, the distance between two consecutive nodes (one loop) is exactly half a wavelength (\( \lambda/2 \)), not 1 full wavelength.
Why other options are incorrect:Options A, B, and C are all scientifically correct descriptions of nodes, meaning they fail the "INCORRECT" criterion of the question.
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