equivalence principle
E7349
The equivalence principle is the foundational idea in relativity that locally, the effects of gravity are indistinguishable from those of acceleration, unifying gravitational and inertial mass.
All labels observed (3)
| Label | Occurrences |
|---|---|
| equivalence principle canonical | 5 |
| weak equivalence principle | 2 |
| Einstein equivalence principle | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T79739 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: equivalence principle Context triple: [theory of relativity, coreConcept, equivalence principle]
-
A.
Einstein field equations
The Einstein field equations are the core mathematical framework of general relativity, relating the curvature of spacetime to the distribution of matter and energy.
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B.
theory of relativity
The theory of relativity is a fundamental framework in physics, developed by Albert Einstein, that revolutionized our understanding of space, time, gravity, and motion.
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C.
law of universal gravitation
The law of universal gravitation is Newton’s fundamental physical law stating that every pair of masses in the universe attracts each other with a force proportional to the product of their masses and inversely proportional to the square of the distance between them.
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D.
Does the Inertia of a Body Depend Upon Its Energy Content?
"Does the Inertia of a Body Depend Upon Its Energy Content?" is Albert Einstein’s 1905 paper that first articulated the mass–energy equivalence principle, commonly expressed as E = mc².
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E.
Lorentz transformation
The Lorentz transformation is a set of equations in special relativity that relate space and time coordinates between two inertial reference frames moving at a constant velocity relative to each other, ensuring the constancy of the speed of light.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: equivalence principle Target entity description: The equivalence principle is the foundational idea in relativity that locally, the effects of gravity are indistinguishable from those of acceleration, unifying gravitational and inertial mass.
-
A.
Einstein field equations
The Einstein field equations are the core mathematical framework of general relativity, relating the curvature of spacetime to the distribution of matter and energy.
-
B.
theory of relativity
The theory of relativity is a fundamental framework in physics, developed by Albert Einstein, that revolutionized our understanding of space, time, gravity, and motion.
-
C.
law of universal gravitation
The law of universal gravitation is Newton’s fundamental physical law stating that every pair of masses in the universe attracts each other with a force proportional to the product of their masses and inversely proportional to the square of the distance between them.
-
D.
Does the Inertia of a Body Depend Upon Its Energy Content?
"Does the Inertia of a Body Depend Upon Its Energy Content?" is Albert Einstein’s 1905 paper that first articulated the mass–energy equivalence principle, commonly expressed as E = mc².
-
E.
Lorentz transformation
The Lorentz transformation is a set of equations in special relativity that relate space and time coordinates between two inertial reference frames moving at a constant velocity relative to each other, ensuring the constancy of the speed of light.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
concept in general relativity
ⓘ
physical principle ⓘ |
| appliesTo | all non-gravitational interactions in Einstein equivalence principle ⓘ |
| assumes | test bodies do not significantly disturb the gravitational field ⓘ |
| category | principle of relativity ⓘ |
| conceptualConsequence | gravity can be described as curvature of spacetime ⓘ |
| contrastsWith | view of gravity as a Newtonian force field ⓘ |
| coreIdea | locally effects of gravity are indistinguishable from effects of acceleration ⓘ |
| EinsteinFormIncludes |
local Lorentz invariance
ⓘ
local position invariance ⓘ |
| experimentalStatus | verified to very high precision ⓘ |
| field |
gravitational physics
ⓘ
physics ⓘ relativity theory ⓘ |
| foundationOf | general relativity ⓘ |
| hasFormulation |
Einstein equivalence principle
ⓘ
strong equivalence principle ⓘ weak equivalence principle ⓘ |
| hasKeyPhrase | locally, physics in a freely falling frame is that of special relativity ⓘ |
| historicalDevelopmentPeriod | early 20th century ⓘ |
| implies |
all test bodies fall with same acceleration in a given gravitational field
ⓘ
equivalence between uniform acceleration and uniform gravitational field locally ⓘ universality of free fall ⓘ |
| inspiredBy |
Galileo Galilei's experiments on falling bodies
ⓘ
Newtonian concept of equality of inertial and gravitational mass ⓘ |
| localFrameDescription | in a freely falling frame laws of physics reduce to those of special relativity ⓘ |
| localityCondition | valid only in sufficiently small regions of spacetime ⓘ |
| mathematicalConsequence | motion of free-falling test particles follows geodesics of spacetime ⓘ |
| predicts |
Shapiro time delay qualitatively
ⓘ
gravitational redshift ⓘ gravitational time dilation ⓘ light bending in a gravitational field ⓘ |
| proposedBy | Albert Einstein ⓘ |
| relates |
gravitational mass
ⓘ
inertial mass ⓘ |
| statesEqualityOf | gravitational mass and inertial mass ⓘ |
| strongFormIncludes |
gravitational binding energy
ⓘ
self-gravitating bodies ⓘ |
| testedBy |
Eötvös-type torsion balance experiments
ⓘ
Lunar Laser Ranging experiments ⓘ MICROSCOPE satellite mission ⓘ atom interferometry experiments ⓘ |
| usedByTheory |
Einstein's theory of general relativity
ⓘ
linked to:
general relativity
|
| usedInThoughtExperiment | Einstein's elevator ⓘ |
| violationsSearchedIn | alternative theories of gravity ⓘ |
| violationsWouldImply | breakdown of general relativity ⓘ |
| weakFormFocusesOn | universality of free fall for test bodies ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: equivalence principle Description of subject: The equivalence principle is the foundational idea in relativity that locally, the effects of gravity are indistinguishable from those of acceleration, unifying gravitational and inertial mass.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.
Antimatter Experiment: Gravity, Interferometry, Spectroscopy
→
researchArea
→
weak equivalence principle
ⓘ
linked to: equivalence principle
STEP (Satellite Test of the Equivalence Principle)
→
testsPrinciple
→
Einstein equivalence principle
ⓘ
linked to: equivalence principle
linked to: equivalence principle