forbidden band: meaning, definition, pronunciation and examples
Very LowTechnical / Academic
Quick answer
What does “forbidden band” mean?
A range of energy levels that electrons in a solid material cannot occupy.
Audio
Pronunciation
Definition
Meaning and Definition
A range of energy levels that electrons in a solid material cannot occupy.
In solid-state physics, the forbidden band (or band gap) is an energy range between the valence band and the conduction band where no electron states exist. It determines whether a material is a conductor, semiconductor, or insulator.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences exist. Spelling of related terms may differ (e.g., 'behaviour' vs. 'behavior').
Connotations
Purely technical in both dialects.
Frequency
Equally rare in both dialects, confined exclusively to physics and engineering discourse.
Grammar
How to Use “forbidden band” in a Sentence
The [material] has a [adjective] forbidden band.Electrons cannot cross the forbidden band.Vocabulary
Collocations
Examples
Examples of “forbidden band” in a Sentence
adjective
British English
- The forbidden-band energy was measured precisely.
American English
- Forbidden-band theory explains the properties of insulators.
Usage
Meaning in Context
Business
Not used.
Academic
Used in physics, materials science, and electrical engineering textbooks and papers.
Everyday
Never used.
Technical
Core term in semiconductor physics and solid-state device design.
Vocabulary
Synonyms of “forbidden band”
Vocabulary
Antonyms of “forbidden band”
Watch out
Common Mistakes When Using “forbidden band”
- Using it in non-technical contexts.
- Confusing it with 'forbidden fruit'.
- Saying 'forbidden band' when 'band gap' is more common.
FAQ
Frequently Asked Questions
Yes, they are synonymous terms in solid-state physics.
Yes, in conductors, the forbidden band width is essentially zero, allowing electrons to move freely.
Almost exclusively in university-level physics, materials science, or electrical engineering courses and literature.
Imagine a valley (forbidden band) between two hills (valence and conduction bands). Electrons need enough energy to cross the valley to conduct electricity.
Forbidden band is usually technical / academic in register.
Forbidden band: in British English it is pronounced /fəˈbɪd.ən bænd/, and in American English it is pronounced /fərˈbɪd.ən bænd/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of a forbidden city—electrons are not allowed to live in the 'forbidden band' of energy.
Conceptual Metaphor
ENERGY LEVELS ARE PLACES TO LIVE; A FORBIDDEN BAND IS A PROHIBITED ZONE.
Practice
Quiz
What does the 'forbidden band' refer to in physics?