WHat is the optical approximation?

Details WHat is the optical approximation? WHat is the optical approximation?

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988cqgra...5.1397j&link_type=abstract

Classical and Quantum Gravity (ISSN 0264-9381), vol. 5, Oct. 1, 1988, p. 1397-1401. SNSF-supported research.

Physics

Optics

1

Approximation, Black Holes (Astronomy), Geometrical Optics, Quantum Theory, Field Theory (Physics), Schwarzschild Metric, Space-Time Functions, Spherical Harmonics, Wave Equations

Scientific paper

Recently it has been claimed that, in the space surrounding a black hole, a two-dimensional quantum stress-energy tensor can be regarded as an approximate four-dimensional tensor via the 'geometrical optics approximation' (Balbinot, 1986; Balbinot and Barletta, 1988; and Shizume and Takagi, 1987). This claim seems to be false and results from a misunderstanding of the nature of the approximation.

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