Fermat’s principle in black-hole spacetimes
2018 ◽
Vol 27
(14)
◽
pp. 1847025
◽
Keyword(s):
Black-hole spacetimes are known to possess closed light rings. We here present a remarkably compact theorem which reveals the physically intriguing fact that these unique null circular geodesics provide the fastest way, as measured by asymptotic observers, to circle around spinning Kerr black holes.
Keyword(s):
2021 ◽
Vol 2021
(11)
◽
pp. 059
2019 ◽
Vol 488
(2)
◽
pp. 2412-2422
◽
Keyword(s):
2015 ◽
Vol 24
(12)
◽
pp. 1544022
◽
Keyword(s):
2020 ◽
Vol 29
(14)
◽
pp. 2042003
2019 ◽
Vol 28
(16)
◽
pp. 2040012
Keyword(s):