The speed of light. What's the story, really?

[alexg]

Once again the difference seems to be about semantics, not physics. I call it relativistic mass, you call it momentum. The energy is the same no matter how we describe it.

Yes, but the term 'relativistic mass' has lead many to think that an objects gravity increases as the 'relativistic mass' increases.

 

[pawprint]

Yes, but the term 'relativistic mass' has lead many to think that an objects gravity increases as the 'relativistic mass' increases.

Your point is well taken. I am happy to be corrected and will endeavour to keep this in mind.

 

[pawprint]

In the same vein I now understand what hgwellsjnr was getting at, although it took a different thread to find it. When I used the term 'subjective' I should more accurately have referred to 'frames of reference'. Thank you hgwellsjnr.