- #1

- 184

- 4

But why does surface area of an Event Horizon increase?

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter avito009
- Start date

- #1

- 184

- 4

But why does surface area of an Event Horizon increase?

- #2

martinbn

Science Advisor

- 2,714

- 1,075

That's a theorem (proven by Hawking). Are you asking about the proof of the theorem?

- #3

mathman

Science Advisor

- 8,046

- 535

Surface area depends on radius. Radius is proportional to mass.

But why does surface area of an Event Horizon increase?

- #4

- 7

- 0

But why does surface area of an Event Horizon increase?

It increases due to the black hole pulling more material into itself, therefore trapping it in the event horizon, enlarging it. The material would get trapped into an 'orbit' around the black hole. Never able to escape, neither get pulled into the black hole.

- #5

Drakkith

Staff Emeritus

Science Advisor

- 21,727

- 5,709

- #6

Nugatory

Mentor

- 13,842

- 7,237

But why does surface area of an Event Horizon increase?

The surface area of a black hole is given by ##4\pi{R}^2## where ##R## is the Schwarzschild radius. The schwarzschild radius increases as mass falls into the black hole, so the area also does.

- #7

Nugatory

Mentor

- 13,842

- 7,237

yes.It increases due to the black hole pulling more material into itself

That's not right. The trapped material falls through the event horizon and into the central singularity rather quickly; it's just that an observer outside the event horizon doesn't get to see it.therefore trapping it in the event horizon, enlarging it. The material would get trapped into an 'orbit' around the black hole. Never able to escape, neither get pulled into the black hole.

This question has been the subject of many threads over in the relativity forum, so you may want to try searching the topic there.

Share:

- Replies
- 15

- Views
- 2K

- Replies
- 1

- Views
- 2K