Black Hole Paradox?

[dduckwessel]

Could the Doppler Effect explain black holes?

 

http://www.google.ca/imgres?q=the+doppler+effect&hl=en&biw=1024&bih=673&gbv=2&tbm=isch&tbnid=AzBt9ucf9Bl8wM:&imgrefurl=http://physicshelp.co.uk/red-shift.php&docid=EQtCOhQslKXSuM&imgurl=http://physicshelp.co.uk/images/imaging/police-car-doppler.jpg&w=468&h=321&ei=vezgTveUDcrq0gHKpKzUBw&zoom=1

[modest]

Thanks modest. I read your post through carefully several times. And now I think I see what you mean.

 

The black hole, does not get bigger, by new matter falling right down into the hole's centre. Rather, the new matter builds up around the hole's outer rim . So the hole expands, not from the centre, but by adding more "layers" to its outside.

 

Hope I've understood it correctly! But honestly, "black holes" still remind me of "caloric fluid"! :)

That is precisely what I meant which makes me really happy because I had a hard time figuring out how to say it and it is a rare occurrence that I'm understood :-)

 

~modest

[modest]

Could the Doppler Effect explain black holes?

 

http://www.google.ca/imgres?q=the+doppler+effect&hl=en&biw=1024&bih=673&gbv=2&tbm=isch&tbnid=AzBt9ucf9Bl8wM:&imgrefurl=http://physicshelp.co.uk/red-shift.php&docid=EQtCOhQslKXSuM&imgurl=http://physicshelp.co.uk/images/imaging/police-car-doppler.jpg&w=468&h=321&ei=vezgTveUDcrq0gHKpKzUBw&zoom=1

No more than wet could explain rain

 

In certain coordinates, like Schwarzschild freefall coordinates, a black hole's redshift is largely the result of Doppler shift. That doesn't make Dopper shift the explanation of black holes. It just means that certain phenomena related to black holes can be interpreted as a Doppler shift if you look at the black hole a certain way.