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2 answers
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For someone staying on Earth, what is the minimum possible time to send a spaceship to Alpha Centauri and have it back?

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1 answer
54 views

Units make speed of light dimensionless..?

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0 answers
17 views

What is the correct derivation for particle concentration from one frame to another?

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1 answer
189 views

Tensor acting on another tensor

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1 answer
38 views

How to calculate the relativistic final velocity? What's the formula?

3 votes
1 answer
1k views

Proper time for a light particle

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0 answers
45 views

Time taken to travel by light a minimum or maximum?

2 votes
3 answers
176 views

Work in special relativity

-1 votes
0 answers
21 views

The momentum delivered to completely absorbing surface by an oscillating electron through electromagnetic waves is not ENERGY/$c$. Am I right?

6 votes
1 answer
686 views

How could any frame of reference be inertial?

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4 answers
83 views

Why is some mass converted into energy when neutrons and protons combine to form nucleus?

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Does anybody know a physical explanation for the refractive index independence of the Sagnac Interferometer fringe shift?

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5 answers
74 views

A question about relativity and time dilation from a lay-person

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1 answer
480 views

The Lorentz Transformation of the electric field of a moving charge

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