>> Ur, no. The speed of light in a vacuum doesn't vary at all. It's a 
>> universal
>> constant.
>>
>> 299 792 458 m.s^-1
> 
> ....
> 
> How the HECK did they measure that o_O

It's defined that way: one meter is the 1/299 792 458 part of what light 
travels in one second in vacuum...

(Well one meter was defined differently in former times...)

kk

Post a reply to this message