Re: Amazing Photograph.
Originally Posted by
swimfeeders
->
Hi
The speed of light which we use as a constant is the speed of light in a vacuum.
This can be measured accurately.
This speed is finite and works perfectly with the famous E=Mc2.
We know that the speed of light is different in a medium, for instance glass.
I think l get it Swimmy, Einstein based his theories using
the highest speed in a vacuum, which we can measure, as
the constant for his equations! But l still have a query?
On lights journey from its source to us, surely it passes
various high gravity fields on its way here, sometimes
approaching them, and sometimes leaving them, this must
surely affect its speed one way or another? What did Einstein
do about this? Did he then use the average speed to do his
sums?
Regards Donkeyman!