ordinary wave
TechnicalTechnical / Scientific
Definition
Meaning
In physics and seismology, a seismic wave that travels along the surface of the Earth, arriving after the faster primary waves.
In telecommunications and wave theory, a wave that travels through a medium in a predictable, standard way (often contrasted with extraordinary waves).
Linguistics
Semantic Notes
This is a term of art with specific meaning in seismology and telecommunications. It contrasts with 'P-wave' (primary) or 'extraordinary wave'.
Dialectal Variation
British vs American Usage
Differences
No major differences in core technical meaning. Usage frequency and context (e.g., specific curriculum) may vary slightly between academic institutions.
Connotations
Purely technical and descriptive in both regions.
Frequency
Rarely encountered outside of specific scientific and engineering contexts. More common in seismology and antenna/wave propagation texts.
Vocabulary
Collocations
Grammar
Valency Patterns
[Subject: The ordinary wave] + [Verb: arrives/propagates/travels] + [Adverbial: after the P-wave/along the surface][Verb: Identify/Distinguish] + [Direct Object: the ordinary wave] + [Prepositional Phrase: from the extraordinary wave]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None”
Usage
Context Usage
Business
Not used.
Academic
Used in geophysics, seismology, and electrical engineering courses and research papers.
Everyday
Virtually never used.
Technical
Core term in seismology for classifying earthquake wave arrivals; also used in physics describing wave polarization in anisotropic media.
Examples
By Part of Speech
adjective
British English
- The ordinary-wave component was filtered out.
- Ordinary-wave propagation characteristics differ.
American English
- We analyzed the ordinary-wave data.
- The ordinary-wave arrival time was recorded.
Examples
By CEFR Level
- Seismographs record ordinary waves after the initial tremor.
- The speed of an ordinary wave is slower than that of a primary wave.
- In anisotropic crystals, the refractive index for the ordinary wave is independent of the direction of propagation.
- Geophysicists use the time lag between the P-wave and the ordinary wave to calculate the earthquake's epicentral distance.
Learning
Memory Aids
Mnemonic
Ordinary waves are the 'other' main waves after the primary ones; think 'O' for 'Other'.
Conceptual Metaphor
A follower or secondary messenger, arriving after the main event to deliver information about the medium it travelled through.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid literal translation ('обычная волна') in technical contexts where the specific scientific term ('S-волна', 'вторичная волна') is required.
- Do not confuse with 'обыкновенная волна' in optics/electrodynamics, which is a direct equivalent but in a different technical field.
Common Mistakes
- Using 'ordinary wave' in general language to mean a normal/non-exceptional wave (e.g., at the beach).
- Confusing it with 'surface wave' (a type of ordinary wave in seismology).
Practice
Quiz
In which field is the term 'ordinary wave' most precisely defined?
FAQ
Frequently Asked Questions
In seismology, yes, an ordinary wave typically refers to the S-wave (secondary or shear wave).
No, it is a technical term. Using it in everyday contexts would be confusing and incorrect.
It is a shear wave that moves rock particles perpendicular to the direction of wave travel and arrives after the faster P-wave.
No, it does not have a standard, non-technical meaning.