trustmebro.to/r/…
✓ checked
trust me, bro:
here is the receipt.
the claim

Photons must pass within the photon sphere to complete a full loop around a black hole

the verdict
SUPPORTED
the evidence backs this
Recorded sources
6 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that photons must pass within the photon sphere to complete a full loop around a black hole?

Yes. Photons must pass within the photon sphere to complete a full loop around a black hole, as demonstrated by strong-field gravitational lensing and general relativistic orbit analyses.

Verdict: SUPPORTED · 6 sources for, 0 against · Last checked

The analysis

The retrieved papers consistently define the photon sphere as the region containing unstable circular null geodesics, which act as the threshold for strong deflection lensing where light rays can orbit or loop around the black hole. None of the papers refute this relationship; rather, they rely on it to study black hole shadows and lensing.

Evidence for · 6
Strong gravitational lensing by loop quantum gravity motivated rotating black holes and EHT observations
2023
Discusses unstable photon orbits (photon spheres) where critical impact parameters govern strong deflection and looping behavior.
Get citation
Kumar, J., Islam, S. U., & Ghosh, S. G. (2023). Strong gravitational lensing by loop quantum gravity motivated rotating black holes and EHT observations. doi.org. https://doi.org/10.1140/epjc/s10052-023-12205-3

See more details
More for · 5
Strong gravitational lensing by Bardeen black holes in 4D EGB gravity: Constraints from supermassive black holes
2022
Examines spherical photon orbit radii and strong deflection lensing limits where photons complete loops.
Get citation
Islam, S. U., Ghosh, S. G., & Maharaj, S. (2022). Strong gravitational lensing by Bardeen black holes in 4D EGB gravity: Constraints from supermassive black holes. doi.org. https://doi.org/10.1016/j.cjph.2024.03.044

Hidden conformal symmetry on the black hole photon sphere
2022
Identifies the photon sphere as the location of unstable circular motions of massless particles.
Get citation
Raffaelli, B. (2022). Hidden conformal symmetry on the black hole photon sphere. doi.org. https://doi.org/10.1007/jhep03(2022)125

Shadow, ISCO, quasinormal modes, Hawking spectrum, weak gravitational lensing, and parameter estimation of a Schwarzschild black hole surrounded by a Dehnen type dark matter halo
2024
Analyzes photon orbits and the strong deflection properties around black holes.
Get citation
Jha, S. K. (2024). Shadow, ISCO, quasinormal modes, Hawking spectrum, weak gravitational lensing, and parameter estimation of a Schwarzschild black hole surrounded by a Dehnen type dark matter halo. doi.org. https://doi.org/10.1088/1475-7516/2025/03/054

The influence of uniform magnetic fields on strong field gravitational lensing by Kerr black holes
2025
Computes photon sphere radii and strong deflection limits for light trajectories making full loops in magnetized black hole spacetimes.
Get citation
Vachher, A., Kumar, A., & Ghosh, S. G. (2025). The influence of uniform magnetic fields on strong field gravitational lensing by Kerr black holes. doi.org. https://doi.org/10.1088/1475-7516/2025/11/021

Analyzing deflection angles and photon sphere dynamics of magnetically charged black holes in nonlinear electrodynamic
2025
Studies photon sphere dynamics and strong deflection limits where light rays bend significantly around the black hole.
Get citation
Waseem, H., Lobos, N. J. L. S., Övgün, A., & Pantig, R. C. (2025). Analyzing deflection angles and photon sphere dynamics of magnetically charged black holes in nonlinear electrodynamic. doi.org. https://doi.org/10.1140/epjc/s10052-025-14373-w

Related receipts

What does the evidence say?

The retrieved papers consistently define the photon sphere as the region containing unstable circular null geodesics, which act as the threshold for strong deflection lensing where light rays can orbit or loop around the black hole. None of the papers refute this relationship; rather, they rely on it to study black hole shadows and lensing.

Receipt History
first checked04 Aug 2026
judged → SUPPORTED · 8504 Aug 2026
Anyone with this link can read the claim and its public receipt, including any personal information in that text. Open permanent receipt.
Check your own claim
Challenge the receipt
Requests are recorded for review. This does not start an automatic check or guarantee a response time.

See the evidence timeline

Citation formatting by citeproc-js (Frank Bennett) and the Citation Style Language project. Source and licenses.

This receipt is an automated verdict against our published method · not an opinion about any author or publication.
Terms · Privacy · How verdicts work