A finite-mass two-throat wormhole admits a complete light-ring phase diagram in which four rings can share one critical impact parameter yet contribute unequally to transmitted strong lensing and scalar resonances.
Tsukamoto, Gravitational lensing by two photon spheres in a black bounce spacetime in strong deflec- tion limits, Phys
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Finite mass two throat wormholes: global light rings, branch resolved strong lensing, and scalar transmission
A finite-mass two-throat wormhole admits a complete light-ring phase diagram in which four rings can share one critical impact parameter yet contribute unequally to transmitted strong lensing and scalar resonances.