crookes space: meaning, definition, pronunciation and examples
C2 / Extremely RareTechnical / Historical / Scientific
Quick answer
What does “crookes space” mean?
A dark region adjacent to the cathode in a low-pressure electrical discharge tube, observed when the pressure is sufficiently reduced.
Audio
Pronunciation
Definition
Meaning and Definition
A dark region adjacent to the cathode in a low-pressure electrical discharge tube, observed when the pressure is sufficiently reduced.
In historical physics, the term denotes the non-luminous region in a cathode ray tube (or similar discharge tube) between the cathode glow and the negative glow, where electrons travel without colliding with gas molecules, indicating a very low gas pressure.
Dialectal Variation
British vs American Usage
Differences
No significant regional differences; term is used identically in British and American technical/historical contexts.
Connotations
Purely technical and historical. Connotes early experimental physics and the discovery of electrons.
Frequency
Extremely rare in both variants, confined to historical texts or specialized discussions on the history of science.
Grammar
How to Use “crookes space” in a Sentence
The [noun: experiment/demonstration/tube] showed a distinct Crookes space.A Crookes space forms [prepositional phrase: near the cathode/at low pressure].Vocabulary
Collocations
Examples
Examples of “crookes space” in a Sentence
adjective
British English
- The Crookes-space phenomenon was crucial.
- Crookes-space observations are recorded.
American English
- The Crookes-space phenomenon was crucial.
- Crookes-space observations are recorded.
Usage
Meaning in Context
Business
Not used.
Academic
Used only in historical or specialized physics papers discussing early discharge tube experiments.
Everyday
Not used.
Technical
Precise term in history of physics and early electrical engineering; may appear in detailed technical descriptions of cathode ray tubes.
Vocabulary
Synonyms of “crookes space”
Strong
Neutral
Weak
Vocabulary
Antonyms of “crookes space”
Watch out
Common Mistakes When Using “crookes space”
- Misspelling as 'Crook's space'.
- Confusing it with the entire 'Crookes tube'.
- Using it in modern contexts where 'cathode dark space' is more standard.
FAQ
Frequently Asked Questions
Essentially, yes. 'Crookes space' is the historical term named after its discoverer, while 'cathode dark space' is the more general modern term.
Almost exclusively in historical texts, museums of science, or university courses on the history of physics and the discovery of the electron.
Yes, in a functioning Crookes tube or similar low-pressure discharge tube, the Crookes space appears as a distinct dark region between the cathode glow and the negative glow.
The phenomenon is fully explained by modern plasma physics, and the more descriptive term 'cathode dark space' (or 'Hittorf dark space') is preferred in technical literature.
A dark region adjacent to the cathode in a low-pressure electrical discharge tube, observed when the pressure is sufficiently reduced.
Crookes space is usually technical / historical / scientific in register.
Crookes space: in British English it is pronounced /krʊks speɪs/, and in American English it is pronounced /krʊks speɪs/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of 'Crooks stealing light' – Sir William Crookes discovered a dark space where light seems to be absent in his tubes.
Conceptual Metaphor
A VACUUM PATHWAY (a clear, empty channel for electrons to travel).
Practice
Quiz
What does the appearance of a Crookes space signify in a discharge tube?