New post in Relativity

How can time be a dimension when it is relative?

July 23rd, 2022

Square of the difference of two four vectors

June 12th, 2020

Does light with a wavelength on the Planck scale become a self-trapping black hole?

November 25th, 2021

Why are four-vectors needed in the Dirac equation, when there are 4 linearly independent 2D matrices?

March 10th, 2020

Cooling of atomic clocks

December 2nd, 2020

Careers in physics that are related to quantum mechanics or relativity?

March 3rd, 2020

Reactionless Drives

August 1st, 2022

Causality principle and Entropy (Second Law)

September 27th, 2020

Special Relativistic approximation to GR

December 17th, 2020

Can we find the boundary conditions of fields from the stationary action principle?

December 12th, 2021

Special Relativistic Time Dilation -- A computer in a very fast centrifuge

August 1st, 2022

Why is velocity defined as 4-vector in relativity?

August 19th, 2020

Is Einstein's characterization of "time" as "the position of the little hand of my watch" definitive and binding in the RT?

August 1st, 2022

What if a light clock travels perpendicular to mirrors that make up the clock?

May 15th, 2020

Does Special Relativity Imply Multiple Realities?

December 30th, 2020

Speed of gravitational waves vs speed of light

April 1st, 2021

Doesn't Warp theory violate causality?

August 1st, 2022

Mechanism by which electric and magnetic fields interrelate

August 1st, 2022

Space-like and time-like: where do the names come from?

August 1st, 2022

Reducing General Relativity to Special Relativity in limiting case

August 1st, 2022

No FTL information implies no FTL travel?

August 1st, 2022

Why acceleration is not relative in General Relativity?

October 1st, 2020

In coordinate-free relativity, how do we define a vector?

August 2nd, 2020

Does the future already exist? If so, which one?

February 12th, 2020

Why do clocks measure arc-length?

October 23rd, 2020

How can time be relative?

December 4th, 2020

Time Dilation - How does it know which Frame of Reference to age slower?

March 21st, 2020

Cross-section in relativistic limit: Fermi's golden rule still valid?

August 1st, 2022

Is it invalid to say that some event might have "happened" for some observers in the universe, but not for others?

December 22nd, 2020

Difference between timelike and spacelike vectors

April 2nd, 2021