3rd Enigma

Nolan is my name. Well, that's what I am told.

Could someone tell me- 1) What is the speed of light measured by? 2) What possible factors did play an affect on how the light was measure? 3) Is there proof that nothing can travel faster than the speed of light? I ask this because I have done enough research to know how they did it. Yet I still have questions regarding on if people think that the tester speed was a factor into it or rather not. So do people believe that the speed of light is already scientifically proven or perhaps that their measurements may have been altered by the equipment they used.

Hey, I getting ready to start my next major project in my electronics program and I would like to ask some opinion on how a good laser audio ear would be made. Having efficient laser receptor (emitter is a cheap laser pointer) and good gain on the output to be used by a variety of speakers. !NOTE! I am asking for hints to improve circut not necessaily making it.