Physics Waves DUHS 2023
PMDC Verified Question 47 of 125
In standing waves, the distance between two consecutive nodes or antinodes is:
A
\( 2\lambda \)
B
\( \lambda/2 \)
C
\( \lambda/4 \)
D
\( \lambda \)
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: \( \lambda/2 \)
Concept:

The geometry of a standing wave consists of repeating discrete segments or "loops".

Solution:

  • A full wavelength (\( \lambda \)) must contain exactly two identical loops to complete a full cycle (one "up" loop and one "down" loop).


  • The boundaries of a single loop are nodes. The center of a single loop is an antinode.


  • Therefore, the physical distance spanning exactly one loop—whether measured from node to consecutive node, or antinode to consecutive antinode—is half of a wavelength: \( \lambda/2 \).


Why other options are incorrect:

\( \lambda/4 \) is the shortest distance between a node and an adjacent antinode. \( \lambda \) is the distance of two full loops.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

Previous Question All Waves MCQs Next Question

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.

Enter Arena Sprint iOS App Android App