How to explain it? Any experiment can only cause the condition you are tryng to prove didn’t happen.

So to see the particle at rest, you would need to hit it with a photon to energize it to see it, so the force of hitting it will cause it to move.

Speed of light | c = 299792458 m s^{-1} |

Gravitational constant | G = 6.673(10) x 10^{-11} m^{3} kg^{-1}s^{-2} |

Plank’s constant (reduced) | = h/2π = 1.054571596(82) x 10^{-34} kg m^{2} s^{-1} |

Boltzmann constant | k = 1.3806502(24) x 10^{-23}kg m^{2} s^{-2}K^{-1} |