I've already read the below questions (and their answers) regarding neutrinos vs. electromagnetic waves propagating through space, but I'm still not clear on something.
- Neutrinos arrived before the photons (supernova)
- The delay between neutrinos and gammas in a supernova, and the absolute mass scale of neutrinos
- Neutrino Speed in Supernova
- Speed of neutrinos (Especially dmckee's answer)
Given that
- Light from SN 1987A arrived 2 or 3 hours after its neutrinos, implying that it was "slowed down" relative to the neutrinos
- Light from SN Refsdal has been "lensed" multiple times to re-appear on time scales of several decades, implying that light interacts with matter (mass)
- Neutrinos interact extremely little with matter but are known to have mass and energy
Question
Why did neutrinos (with their mass and momentum) arrive before the light (considered to be massless) from SN 1987A? Considering SR and GR, this seems to be a contradiction. What am I missing?
Postscript
I've tried desperately to avoid using the word "photon" above (in reference to light) after learning of the Lamb Controversy™ (via related discussions here and here on Phys SE).