Say 2 particles A and B.(adsbygoogle = window.adsbygoogle || []).push({});

Particle A is stationary in this inertial reference frame.

Particle B is moving with constant velocity v=0.8c

Both is a similar isotope of the same radioactive element.(hence, supposedly same half-life)

Q1: Which will decay faster in this reference frame?

In theory, it's A(stationary), B will decay slower due to time dilation.

However, if we change our perspective and take a different reference frame, B is stationary in this refernce frame. Hence, A is moving in the opposite direction with v=0.8c relative to B.

Q2: Which will decay faster this time?

Not sure if there a paradox in this 1. Just a problem that occurred to me that troubles me a lot.

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# Relativistic Paradox

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