Re: How to take photos of a black hole ? ? ?

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From: Daniele Gasparri
Date: Fri, 19 Nov 2004 20:35

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Hans-Marc Olsen wrote:
> It will eat all the light, so how can I take a photo of it?

You have 2 main indirect methods and 1 direct:

1)  you can image a matter that fall into the black hole. The matter 
near its, emits an intense beam of X-rays
2)  If you are very lucky, you can "see" the black hole like a 
gravitational lens.

The only direct method is a pure theory. A black hole, especially if it 
is very very small (these BH are not formed after gravitational collapse 
of a star, but after the big bang, called primordial BH) it can emit an 
high energy radiation (hawking radiation)caused by quantum fluttuations 
of a space near the event horizon and you could see it..you could..

Daniele Gasparri
Perugia (Italy)
Tel: +393334074378
www.marcofazzoli.com/danielegasparri

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