Physics Waves BUMHS 2024
PMDC Verified Question 24 of 125
Distance between consecutive crest and trough of water waves is?
A
\( \lambda \)
B
\( \lambda/2 \)
C
\( \lambda/4 \)
D
none of these
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:

A wave's structural geometry divides neatly into fractions of a total wavelength.

Solution:

  • One complete wavelength (\( \lambda \)) is the full distance from one crest to the very next crest.


  • Because standard waves are symmetrical, a trough sits exactly halfway between two consecutive crests.


  • Therefore, the horizontal distance from the peak of a crest to the deepest point of the immediately adjacent trough is exactly half of a full wavelength: \( \lambda/2 \).


Why other options are incorrect:

\( \lambda \) is the distance from crest to crest. \( \lambda/4 \) is the horizontal distance from a crest to the zero-crossing equilibrium line.

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.

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