100 Years of Special Relativity

phrotoma writes "Wikipedia notes in their Selected Anniversaries section that today marks the 100th anniversary of Albert Eintein's publication of the third of his four Annus Mirabilis Papers entitled On the Electrodynamics of Moving Bodies; the seminal work that introduced the concepts which would come to be known as Special Relativity. This event is also being commemorated in a UN endorsed celebration of physics: World Physics Year 2005 with talks and events at public schools, museums, and universities the world over."

Comments

100 Years

[Inkieminstrel]

100 years according to which observer?

Re:100 Years

[Black Parrot]

> The first five posts are all riffs on the same theme -- dilation of time. Does that say more about the level of education among Slashdotters, or about our lack of creativity, or both?

Maybe it's just one post arriving via gravitational lensing.

Obligatory Family Guy Quote

[everphilski]

Einstein is working in a patent office
Smith: I'd like to patent this. I call it "Smith's Theory of Relativity"
Einstein browses through Smith's work, nods approvingly and then kills Smith with the overhead window door
-everphilski-

Re:Depends on How You Look at It

[wass]

Relativity is brilliant, and changed science and culture forever. But it's really an ingenious refinement of Maxwell's field equations, even more than extra precision added to Newton's formulas.

First of all you're only referring to special relativity here, which ignores acceleration and gravity. Secondly, there were still some leaps of faith to be made, such as assuming c is constant in all frames of reference, which Lorentz showed non-Newtonian transformations that would allow this for Maxwell's equations. And expanding the new energy definition and concluding the zeroth-order term (mc^2) is the rest energy of mass also took another leap of faith (although that paper wasn't published until a few months after this first relativistic one).

But even so, discovering the connection between relativity and E&M is still amazing, in my opinion. For examle, the permittivity (epsilon_0) and permeability (mu_0) of free space are two constants that can be measured in the laboratory rather easily. Yet Maxwell's equations in vacuum describe waves travelling at speeds 1/sqrt(epsilon_0*mu_0), which is exactly the speed of light in vacuum (although in Gaussian units this connection is far more obvious). It's pretty amazing to think how these are related. But you still need to make some assumptions to get the Lorentz transforms between reference frames.

Additionally, even simple special relativity was extremely controversial, it rejected many assumed notions of space/time. There were also many paradoxes that took awhile to get ironed out. Many scientists didn't believe in relativity until it was shown in experiment. And in fact the theories of relativity were so controversial that the Nobel committee didn't want to award Einstein the prize based on these, so went for the safer 'Photoelectric Effect' instead.

And thirdly, general relativity, although again not included in this 100 year anniversary, is total genius, and it took Einstein 10 years to come up with the theory. So don't wave off relativity as just a 'refinement of Maxwell's field equations' because it really is much more than that.