B What is the Light Constant and Its Relationship to Maxwell's Equations?

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Is the light constant (3*10^8 m/s) the maximum speed for a beam of light or its photons which travel in waves?
 
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There are a number of apparent misconceptions lurking beneath your question. Rather than try to disentangle them, it would be better for you to give more information about why you want to know. What specific problem or scenario are you interested in? What sources are you using to understand the subject?
 
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The best way to understand the issue is to actually forget about light - its real basis is symmetry:
http://www2.physics.umd.edu/~yakovenk/teaching/Lorentz.pdf

Light when radiated travels at exactly the same speed regardless of the speed of the source in a vacuum (the speed of the source does not enter into Maxwell's equations) so must travel at the constant speed derived above being the only speed constant in all frames.

IMHO its better to derive Maxwell's equations from relativity so no confusion can result:
http://cse.secs.oakland.edu/haskell/Special Relativity and Maxwells Equations.pdf

Thanks
Bill
 

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