scott wrote:
> The key point then is that when you start to steer 

That's cool, yes. I'm sure that people actually engineering cars or trains 
go though all that sort of stuff. I don't imagine the teacher would have 
assigned the problem if we needed to calculate that sort of thing. :-)

>> Altho I do remember that at one time I knew how to calculate the speed 
>> of light given the mass and charge of an electron, and why it worked 
>> that way.
> 
> I can't even figure out how a black hole manages to bend light when 
> photons have no mass :-(

They do have mass. They just don't have rest mass. Indeed, the color of the 
photon tells you its mass. And, in theory, the photons are going in a 
straight line, and it's only the spoon ^H^H^H^H^H space that's bent.

-- 
   Darren New, San Diego CA, USA (PST)
   There's no CD like OCD, there's no CD I knoooow!

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