Since X ray refracts away from the normal,
aψn>aψs
So, the approximation that the kinetic energy 12mv2boom is stored solely along aψl does not hold. Part of energy extending aψl leads to the shortening of aψn to aψs.
But as a whole, the torus can still be modeled as a totally elastic body characterized by the equivalent of a spring constant k. aψs is the bore of the spring contracting as the spring lengthens.
The torus travels,
perpendicular to the plane of the torus, in the direction opposite to the field (E) of the dipole. This was derive from the model of photon as a dipole.
So, from aψs and aψn the respective the incident and refractive λs are derived,
λi=2nπaψs
and
λr=2nπaψn
where n is the number of wavelengths along 2πaψ. Most of the time, n=1 and is not expected to change across the refracting medium boundary.
Is X ray visible after collapse? That depends on aψn, the size of aψ after collapse. Is aψn visible?
Which leads to normal color lights...