why speed of light is c in vacuum?

[pramodmaths]

Being a graduate student I want to say "even if we say about the constancy of speed of light,one question
strike about the value of it.Why it was found to be c=2.99*10^8 m/s
why not to some other value."Is it the same to ask why earth attracts
everything towards itself without saying that -"due to gravity".

[Guille]

The speed of the Electromagnetic spectrum (light) in vacuum, the limit of speed in the universe, measurement that we denote with the letter c, and that is aproximatelly 300,000 kilometers per second, has been observed, searched, described, used, and given by scientists (to be exact, physicists). Scientists are those who are in search of scientific knowledge, and they do so in the correct manner, which in the scientific method is asking: what, when, who (for social sciences), where, how much, and most importantly for science, how. These are the questions that science makes to things that happne, to experiences, to events. The one last type of questions that is noyt convered by science 8at least until now), is covered by philosophy, and it is WHY. So, I guess that you should search through recent philosophers that have spoken about light and it's speed, and then you might get answers, but most probably no, for philosphy gives tools to reach answers, and then each person gives his/her own answers.

But I think you should have in mind that the speed of light, is just a number invented by human beings. Of course light has that speed, but light doesn't have in it's memory (imagen it had one) "always go at 300,000 km/s" no it doesn't, it has "go at THE speed".

[dleviwing]

Being a graduate student I want to say "even if we say about the constancy of speed of light,one question
strike about the value of it.Why it was found to be c=2.99*10^8 m/s
why not to some other value."Is it the same to ask why earth attracts
everything towards itself without saying that -"due to gravity".

Speed of light: The rate at which space vibrates and changes its density.

Gravity: The condensing of space by structured matter.(physical particles)

[gs_cmans]

i couldnt agree that space vibration of density gives the speed limit of light c, because we know that light can travel even in absolute vaccum(atleast theoritically) where the density is zero. Do you mean about the density of energy in vaccum, where as by Quantum Field Theory the vaccum is not really vaccum and filled with Energy.(Does this solves universe origin in anyway!!!!!).