Photons in the Absence of Neutrinos

While it is fairly easy to picture what happens in a space with no photons, it is considerably more difficult to imagine what happens in a space with no neutrinos.

Neutrinos are associated with space. When they are removed from a space, everything becomes smaller, including the space itself.

However, if we leave the photons inside, the space does not completely disappear. The photons occupy space, so they will prevent the space from collapsing completely.

But there will be no space between the photons. The photons will start to vibrate wildly inside the crammed space. Presumably, they will start to oscillate in harmony with each other.

Any ordinary matter trapped inside the space will oscillate in harmony with the photons.

The space becomes a rigid block of ordinary matter and photons oscillating in harmony with each other.

Relative to a local ruler inside the space, the photons no longer move. The local speed of light inside a space with no neutrinos is zero.