On May 19, 2:03*pm, "Szczepan Bialek" wrote:
QED is about Photons, not EM waves.

From "QED", by Feynman: "So now, I present to you the three basic
actions,
from which all the phenomena of light (EM waves) and electrons arise.

-Action #1: A photon goes from place to place.
-Action #2: An electron goes from place to place.
-Action #3: An electron emits or absorbs a photon."

Photons and EM waves are the same quantized phenomena, viewed in
different mathematical ways. A single photon can pass through two
slots
at the same time and interfere with itself on the other side.
--
73, Cecil, w5dxp.com