Shapiro delay
E918804
Shapiro delay is a general relativistic time delay experienced by light or signals as they pass through the gravitational field of a massive object, causing them to take slightly longer to travel than they would in flat spacetime.
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
general relativistic effect
ⓘ
gravitational time delay ⓘ relativistic time dilation phenomenon ⓘ |
| affects |
electromagnetic radiation
ⓘ
light signals ⓘ radio signals ⓘ |
| alsoKnownAs | gravitational time delay ⓘ |
| assumes | null geodesic propagation of light ⓘ |
| cause | curvature of spacetime by mass ⓘ |
| dependsOn |
geometry of the signal path
ⓘ
gravitational potential along the signal path ⓘ impact parameter of the light path ⓘ mass of the intervening body ⓘ |
| describes | extra time taken by light or signals traveling near a massive body ⓘ |
| effectOnTravelTime | increases travel time compared to flat spacetime ⓘ |
| field | general relativity NERFINISHED ⓘ |
| firstTestContext | radar ranging to Venus and Mercury GENERATED ⓘ |
| firstTestedUsing | radar signals bounced off inner planets GENERATED ⓘ |
| hasBeenMeasuredIn |
binary pulsar PSR B1913+16
NERFINISHED
ⓘ
double pulsar PSR J0737−3039 NERFINISHED ⓘ |
| hasBeenMeasuredNear |
planets
ⓘ
the Sun NERFINISHED ⓘ |
| isDistinctFrom | geometric time delay in lensing ⓘ |
| isMaximizedWhen | signal passes close to the massive body ⓘ |
| isOneOf | classical tests of general relativity ⓘ |
| isPredictedBy | Einstein's general theory of relativity NERFINISHED ⓘ |
| isRelatedTo |
gravitational lensing
ⓘ
gravitational redshift ⓘ time dilation in gravitational fields ⓘ |
| isZeroWhen | no intervening gravitational field is present ⓘ |
| mathematicalForm | logarithmic dependence on impact parameter in weak-field limit ⓘ |
| measuredIn | microseconds for solar system experiments ⓘ |
| occursIn | gravitational field of a massive object ⓘ |
| orderOfMagnitude | tens to hundreds of microseconds for solar conjunction experiments ⓘ |
| relevantFor |
binary pulsar systems
ⓘ
precision navigation in the solar system ⓘ pulsar timing experiments ⓘ spacecraft radio tracking ⓘ tests of alternative theories of gravity ⓘ very long baseline interferometry ⓘ |
| supports | validity of general relativity in the weak-field regime ⓘ |
| testType | solar system test of general relativity ⓘ |
| usedToConstrain |
parameterized post-Newtonian parameter gamma
ⓘ
post-Newtonian parameters ⓘ |
| usedToMeasure |
inclination of binary pulsar orbits
ⓘ
masses of companion stars in binary systems ⓘ |
| wasProposedBy | Irwin I. Shapiro NERFINISHED ⓘ |
| yearProposed | 1964 ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
PSR B1913+16