gravitational redshift: meaning, definition, pronunciation and examples
RareTechnical/Scientific
Quick answer
What does “gravitational redshift” mean?
A phenomenon in physics where light or other electromagnetic radiation from an object is increased in wavelength (shifted to the red end of the spectrum) due to the object's gravitational field.
Audio
Pronunciation
Definition
Meaning and Definition
A phenomenon in physics where light or other electromagnetic radiation from an object is increased in wavelength (shifted to the red end of the spectrum) due to the object's gravitational field.
A prediction of Einstein's general relativity, confirming that time runs slower in stronger gravitational fields, observed as light losing energy (reddening) as it escapes a massive body's gravitational well. It has no figurative meaning.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling of related terms may follow regional conventions (e.g., 'behaviour' vs. 'behavior').
Connotations
Identical technical meaning in both dialects.
Frequency
Equally rare and specialised in both academic communities.
Grammar
How to Use “gravitational redshift” in a Sentence
The [astronomical object] exhibits a measurable gravitational redshift.Scientists detected gravitational redshift in [specific context, e.g., light from a white dwarf].Vocabulary
Collocations
Examples
Examples of “gravitational redshift” in a Sentence
verb
British English
- The light from the neutron star was gravitationally redshifted.
- We need to account for how the signal is gravitational redshifting.
American English
- The data show the spectral lines have been gravitationally redshifted.
- This process gravitationally redshifts the emitted radiation.
adjective
British English
- The gravitational redshift measurement was crucial.
- They studied the gravitational-redshift effect in detail.
American English
- The gravitational redshift data confirmed the theory.
- They made a gravitational-redshift correction to the model.
Usage
Meaning in Context
Business
Not used.
Academic
Primary and exclusive domain. Used in physics, astronomy, and cosmology papers, textbooks, and lectures.
Everyday
Virtually never used. Would only appear in popular science articles or documentaries.
Technical
Core term in relevant technical fields. Precise and unambiguous.
Vocabulary
Synonyms of “gravitational redshift”
Neutral
Weak
Vocabulary
Antonyms of “gravitational redshift”
Watch out
Common Mistakes When Using “gravitational redshift”
- Using 'gravitational redshift' to refer to the redshift from the expansion of the universe (which is cosmological redshift).
- Confusing it with the Doppler effect.
- Misspelling as 'gravitational red shift' (while sometimes seen, the single-word 'redshift' is standard in modern physics).
FAQ
Frequently Asked Questions
No. Gravitational redshift is caused by gravity alone. Cosmological redshift is caused by the expansion of spacetime itself.
Yes, but it requires extremely precise measurements. The Pound-Rebka experiment (1959) first measured it in a laboratory on Earth using gamma rays.
Gravitational blueshift. This occurs when light falls into a gravitational well, gaining energy and shifting to shorter, bluer wavelengths.
It is a direct consequence and test of general relativity, confirming that gravity affects the flow of time and the properties of light.
A phenomenon in physics where light or other electromagnetic radiation from an object is increased in wavelength (shifted to the red end of the spectrum) due to the object's gravitational field.
Gravitational redshift is usually technical/scientific in register.
Gravitational redshift: in British English it is pronounced /ˌɡræv.ɪˈteɪ.ʃən.əl ˈred.ʃɪft/, and in American English it is pronounced /ˌɡræv.əˈteɪ.ʃən.əl ˈred.ʃɪft/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: Gravity is a heavy RED blanket that stretches (redshifts) light trying to escape from underneath it.
Conceptual Metaphor
GRAVITY IS A WELL: Light climbing out loses energy and becomes redder.
Practice
Quiz
What is the primary cause of gravitational redshift?