I'm just watching the story. Not a physicist.
The forces in the bubble collapse are strong enough to produce light. I find that interesting. A weak indicator relative to what's required for fusion.
Well, right. I was just trying to convey a sense of what's involved.
The forces in the bubble collapse are strong enough to produce light. I find that interesting. A weak indicator relative to what's required for fusion.
Right again. A light bulb produces light! Visible light energy is in the range of a few eV ( electron volts ) per photon. The proton-proton coulomb barrier is on the order of MeV ( 1e6 electron volts, ) although, due to tunneling, reactions can take place below the barrier energy. However, the reaction rate falls off exponentially as the energy drops below the threshold, so the barrier energy holds as a rule of thumb for the kinetic energy required to produce fusion.
Note that 1e6 is the difference between leaping 1 meter, and leaping 1 thousand kilometers, and this is an apt comparison since gravitational potential energy is proportional to height, on this scale.