User Nuke

1 vote

What are electromagnetic fields made of?

answered May 2, 2022 at 20:03

1 vote

Is it wrong to say that an electron can be a wave?

answered Jul 26, 2022 at 10:10

0 votes

Special relativity for accelerated trajectories

answered Jul 26, 2022 at 10:46

0 votes

Shapiro time delay

answered Jul 26, 2022 at 10:59

0 votes

What is the complete proof that the speed of light in vacuum is constant in relativistic mechanics?

answered May 3, 2022 at 10:34

0 votes

Why is it necessary that different observers agree on the value of the spacetime interval $ds^2$?

answered May 3, 2022 at 11:45

0 votes

The origin of the value of speed of light in vacuum

answered May 3, 2022 at 12:22

0 votes

How did Einstein know the speed of light was constant?

answered Jul 27, 2022 at 15:34

0 votes

What is time dilation really?

answered Jul 27, 2022 at 15:40

0 votes

Why isn't length contraction permanent even though time dilation is?

answered Jul 27, 2022 at 15:55

0 votes

How long would it take me to travel to a distant star?

answered Jul 27, 2022 at 16:29

0 votes

What is there at a point the universe hasn't expanded past yet?

answered May 4, 2022 at 18:22

-1 votes

Why do objects follow geodesics in spacetime?

answered Apr 6, 2022 at 3:54

-1 votes

If I am travelling on a car at around 60 km/h, and I shine a light, does that mean that the light is travelling faster than the speed of light?

answered Jul 28, 2022 at 11:12

-1 votes

What do imaginary voltage/potential map onto in the physical world?

answered Aug 2, 2022 at 19:37

-1 votes

Why and how is the speed of light in vacuum constant, i.e., independent of reference frame?

answered Jul 27, 2022 at 16:04

-1 votes

If all motion is relative, how does light have a finite speed?

answered Jul 27, 2022 at 14:48

-2 votes

Finiteness of speed of light

answered May 3, 2022 at 15:27

-3 votes

How can time dilation be symmetric?

answered Jul 27, 2022 at 15:23

-3 votes

Can the age of the universe be much bigger than 13.8 billion

answered Apr 4, 2022 at 15:46

-4 votes

What is the proper way to explain the twin paradox?

answered Aug 12, 2022 at 12:04

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21 Answers

What are electromagnetic fields made of?

Is it wrong to say that an electron can be a wave?

Special relativity for accelerated trajectories

Shapiro time delay

What is the complete proof that the speed of light in vacuum is constant in relativistic mechanics?

Why is it necessary that different observers agree on the value of the spacetime interval $ds^2$?

The origin of the value of speed of light in vacuum

How did Einstein know the speed of light was constant?

What is time dilation really?

Why isn't length contraction permanent even though time dilation is?

How long would it take me to travel to a distant star?

What is there at a point the universe hasn't expanded past yet?

Why do objects follow geodesics in spacetime?

If I am travelling on a car at around 60 km/h, and I shine a light, does that mean that the light is travelling faster than the speed of light?

What do imaginary voltage/potential map onto in the physical world?

Why and how is the speed of light in vacuum constant, i.e., independent of reference frame?

If all motion is relative, how does light have a finite speed?

Finiteness of speed of light

How can time dilation be symmetric?

Can the age of the universe be much bigger than 13.8 billion

What is the proper way to explain the twin paradox?