Phys. Rev. Lett. 72, 3301–3304 (1994)Light deflection in perturbed Friedmann universesReceived 5 January 1994; published in the issue dated 23 May 1994 A new formula for light deflection is dreived using only physically observable concepts. The general result is specialized to cosmological perturbation theory and expressed in terms of gauge-invariant perturbation variables. The resulting scalar, vector, and tensor equations are supplemented by simple examples for illustration. The gravity-wave example may be of more than academic interest and even represent an alternative way to detect gravitational waves. © 1994 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.72.3301
DOI:
10.1103/PhysRevLett.72.3301
PACS:
98.80.Hw, 04.25.Nx, 04.30.-w
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