What *is* a photon?

About

My name is Mithuna Yoganathan and I did my PhD in theoretical physics at the University of Cambridge. My channel is about the strange world of mathematics and science. For business enquiries, please email at looking (dot) glass (dot) universe (at) gmail.com I receive an overwhelming amount of email from people who have a theory of everything. I do not open these. If you would like to email about something else, feel free, but I can’t guarantee if/when I will reply- sorry!