How Do Black Holes Exert Gravity If They Absorb Light?

sajithcv
Messages
5
Reaction score
0
Hi friends,.
If black holes absorb light also, how can it exert any gravity outside a particular region? Or something can move faster than light?
 
Physics news on Phys.org
sajithcv said:
Hi friends,.
If black holes absorb light also, how can it exert any gravity outside a particular region? Or something can move faster than light?
This answer from the "black holes" section of the Usenet Physics FAQ addresses that question.
 

Thread 'A sufficient condition for integrability of equation ##\nabla g=0##'

In Philippe G. Ciarlet's book 'An introduction to differential geometry', He gives the integrability conditions of the differential equations like this: $$ \partial_{i} F_{lj}=L^p_{ij} F_{lp},\,\,\,F_{ij}(x_0)=F^0_{ij}. $$ The integrability conditions for the existence of a global solution ##F_{lj}## is: $$ R^i_{jkl}\equiv\partial_k L^i_{jl}-\partial_l L^i_{jk}+L^h_{jl} L^i_{hk}-L^h_{jk} L^i_{hl}=0 $$ Then from the equation: $$\nabla_b e_a= \Gamma^c_{ab} e_c$$ Using cartesian basis ## e_I...
View full post »

Thread 'Hawking After 54 Years Confirmed: BH surfaces don't shrink'

Abstract The gravitational-wave signal GW250114 was observed by the two LIGO detectors with a network matched-filter signal-to-noise ratio of 80. The signal was emitted by the coalescence of two black holes with near-equal masses ## m_1=33.6_{-0.8}^{+1.2} M_{⊙} ## and ## m_2=32.2_{-1. 3}^{+0.8} M_{⊙}##, and small spins ##\chi_{1,2}\leq 0.26 ## (90% credibility) and negligible eccentricity ##e⁢\leq 0.03.## Postmerger data excluding the peak region are consistent with the dominant quadrupolar...
View full post »

Thread 'Relativator (Circular Slide-Rule): Simulated with Desmos - Insight'

Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. The Relativator was sold by (as printed) Atomic Laboratories, Inc. 3086 Claremont Ave, Berkeley 5, California , which seems to be a division of Cenco Instruments (Central Scientific Company)... Source: https://www.physicsforums.com/insights/relativator-circular-slide-rule-simulated-with-desmos/ by @robphy
View full post »

Similar threads

I Supermassive black hole, surface gravity and tidal forces
2
Replies
62
Views
7K
I Can light be reflected in a black hole?
Replies
22
Views
1K
I You can't actually enter a blackhole?
Replies
40
Views
3K
B Theories about light and time near a black hole
Replies
20
Views
2K
B Black hole electromagnetic spectrum
Replies
4
Views
2K
I Can Gravity Escape a Black Hole?
Replies
21
Views
2K
I Can Gravity Escape a Black Hole? | GR Learning
Replies
8
Views
2K
B What Happens When Light Approaches a Black Hole?
Replies
2
Views
1K
I Black Hole Waterfall Analogy & Light Speed
Replies
15
Views
2K
I Is Measuring the One-Way Speed of Light Possible Near a Black Hole?
Replies
10
Views
1K

Hot Threads

Recent Insights

Back
Top