4 ms·
To be pedantic, a particle without mass. Matter also includes things without substance like physical fields. So a photon is matter. At least this is what I was
by bbojan 6y ago
To be pedantic, a particle without mass. Matter also includes things without substance like physical fields. So a photon is matter.
At least this is what I was taught in school many years ago...
- davrosthedalek 6y agoTo be pedantic, a particle without rest-mass...
- Chilinot 6y agoYes, that was a typo on my part.