What Is Your Perspective on the Event Horizon?

LocktnLoaded
Messages
32
Reaction score
0
Could someone give me a formula that would describe an event horizon, and also explain your view?
 
Physics news on Phys.org
v_{esc}=\sqrt{\frac{2GM}{r}}

v_{esc}^2=\frac{2GM}{r}

r=\frac{2GM}{v_{esc}^2}

escape velocity = speed of light (c)

r=\frac{2GM}{c^2}
 


An event horizon can be mathematically described by the formula R = 2GM/c^2, where R is the event horizon radius, G is the gravitational constant, M is the mass of the object, and c is the speed of light. This formula represents the distance from the center of an object where the escape velocity is equal to the speed of light, making it impossible for anything, including light, to escape.

From my perspective, the event horizon is a fascinating and mysterious concept that is a fundamental part of our understanding of the universe. It marks the point of no return, where the gravitational pull of a massive object becomes so strong that not even light can escape. This creates a boundary between the known and the unknown, as anything that crosses the event horizon is forever hidden from our view.

Furthermore, the concept of an event horizon also plays a crucial role in the study of black holes, which are some of the most enigmatic and powerful objects in the universe. The existence of an event horizon is what gives black holes their characteristic properties, such as their immense gravitational pull and ability to distort space and time.

In my opinion, exploring the event horizon is not only a scientific endeavor but also a philosophical one. It raises questions about the nature of space, time, and the limits of our understanding. It challenges us to think beyond what we can observe and encourages us to push the boundaries of our knowledge. Overall, the concept of the event horizon is a captivating and thought-provoking topic that continues to intrigue and inspire scientists and philosophers alike.
 
OK, so this has bugged me for a while about the equivalence principle and the black hole information paradox. If black holes "evaporate" via Hawking radiation, then they cannot exist forever. So, from my external perspective, watching the person fall in, they slow down, freeze, and redshift to "nothing," but never cross the event horizon. Does the equivalence principle say my perspective is valid? If it does, is it possible that that person really never crossed the event horizon? The...
ASSUMPTIONS 1. Two identical clocks A and B in the same inertial frame are stationary relative to each other a fixed distance L apart. Time passes at the same rate for both. 2. Both clocks are able to send/receive light signals and to write/read the send/receive times into signals. 3. The speed of light is anisotropic. METHOD 1. At time t[A1] and time t[B1], clock A sends a light signal to clock B. The clock B time is unknown to A. 2. Clock B receives the signal from A at time t[B2] and...
From $$0 = \delta(g^{\alpha\mu}g_{\mu\nu}) = g^{\alpha\mu} \delta g_{\mu\nu} + g_{\mu\nu} \delta g^{\alpha\mu}$$ we have $$g^{\alpha\mu} \delta g_{\mu\nu} = -g_{\mu\nu} \delta g^{\alpha\mu} \,\, . $$ Multiply both sides by ##g_{\alpha\beta}## to get $$\delta g_{\beta\nu} = -g_{\alpha\beta} g_{\mu\nu} \delta g^{\alpha\mu} \qquad(*)$$ (This is Dirac's eq. (26.9) in "GTR".) On the other hand, the variation ##\delta g^{\alpha\mu} = \bar{g}^{\alpha\mu} - g^{\alpha\mu}## should be a tensor...

Similar threads

Back
Top