I agree. It’s definitely very cool. It really highlights the mass energy equivalence. I’m not at a level of full intuition of relativity, but it’s one of tho

I agree. It’s definitely very cool. It really highlights the mass energy equivalence. I’m not at a level of full intuition of relativity, but it’s one of those things that made a lot more sense once I understood mass energy equivalence. Like where the energy in exothermic fusion comes from: When the strong nuclear force overcomes the electrostatic force, the strong nuclear force increases the kinetic energy (momentum/speed) of the particles. At this point the mass of all particles from their own frames of reference is the same. Once the kinetic energy is lowered (particles are slowed back down to the same speed/temperature of their surroundings) does the mass lower.