Physics Waves PMDC 2021
PMDC Verified Question 88 of 125
Distance Between two Consecutive node is
A
Wave length
B
Wave length by 2
C
Wave length by 4
D
twice of Wave length
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Wave length by 2
Concept:

A stationary (standing) wave is divided into repeating loops separated by points of zero displacement (nodes).

Solution:

  • A full wave cycle (one full wavelength, \( \lambda \)) contains two complete loops (one "positive" displacement loop and one "negative" displacement loop).


  • Therefore, a single complete loop spans exactly half of a wavelength.


  • The boundaries of a single loop are defined by two consecutive nodes. Thus, the distance between them is \( \frac{\lambda}{2} \).


Why other options are incorrect:

The distance between a consecutive node and antinode is \( \lambda/4 \). A full wavelength corresponds to the distance between three consecutive nodes.

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