Is the event horizon of a black hole physical?

In summary: Bekenstein-Hawking entropy of a black hole. This was a bit like a physicist admitting that a year's salary was exactly equal to the price of a new car. It was a fact that nobody could deny...In summary, the conversation discusses the issue of whether or not the event horizon of a black hole is physical. Some argue that it is physical, while others argue that it is merely a set of coordinates. The concept of physicality is debated, with some defining it as something that can be touched or interacted with, while others include energy and matter in their definition. The idea of a "firewall" at the event horizon is also mentioned, and potential explanations for the horizon's physicality are discussed,
  • #71
lol yeah I'm definitely going to have to add that one to my reading material.
and your right it does seem strange on the information side.
 
<h2>1. What exactly is the event horizon of a black hole?</h2><p>The event horizon of a black hole is the boundary surrounding the black hole from which nothing, including light, can escape. It is the point of no return for anything that gets too close to the black hole.</p><h2>2. How is the event horizon of a black hole determined?</h2><p>The event horizon of a black hole is determined by its mass. The more massive the black hole, the larger its event horizon will be. For a non-rotating black hole, the event horizon is directly proportional to its mass.</p><h2>3. Is the event horizon of a black hole a physical object?</h2><p>No, the event horizon of a black hole is not a physical object. It is simply a boundary in space where the gravitational pull of the black hole becomes so strong that nothing can escape from it.</p><h2>4. Can the event horizon of a black hole change in size?</h2><p>Yes, the event horizon of a black hole can change in size. If the black hole gains or loses mass, its event horizon will also change accordingly. Additionally, the event horizon can also change due to the effects of nearby objects or gravitational waves.</p><h2>5. Can anything pass through the event horizon of a black hole?</h2><p>No, nothing can pass through the event horizon of a black hole. Once an object crosses the event horizon, it is pulled into the black hole and cannot escape. This is due to the extreme gravitational pull and intense curvature of space-time near the event horizon.</p>

1. What exactly is the event horizon of a black hole?

The event horizon of a black hole is the boundary surrounding the black hole from which nothing, including light, can escape. It is the point of no return for anything that gets too close to the black hole.

2. How is the event horizon of a black hole determined?

The event horizon of a black hole is determined by its mass. The more massive the black hole, the larger its event horizon will be. For a non-rotating black hole, the event horizon is directly proportional to its mass.

3. Is the event horizon of a black hole a physical object?

No, the event horizon of a black hole is not a physical object. It is simply a boundary in space where the gravitational pull of the black hole becomes so strong that nothing can escape from it.

4. Can the event horizon of a black hole change in size?

Yes, the event horizon of a black hole can change in size. If the black hole gains or loses mass, its event horizon will also change accordingly. Additionally, the event horizon can also change due to the effects of nearby objects or gravitational waves.

5. Can anything pass through the event horizon of a black hole?

No, nothing can pass through the event horizon of a black hole. Once an object crosses the event horizon, it is pulled into the black hole and cannot escape. This is due to the extreme gravitational pull and intense curvature of space-time near the event horizon.

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