Does anyone know what The Beam Of Light is?
I am thinking it is a Thought Experiment
“All truly wise thoughts have been thought already thousands of times; but to make them truly ours, we must think them over again honestly, until they take root in our personal experience.”
— Johann Wolfgang von Goethe
https://fs.blog/2017/06/thought-experiment-how-einstein-solved-difficult-problems/
It is going to take time