Error014

First of all thanks for your answer
I was not angry, rather surprised

I just want to clear up one point

Even though the average scientific education of 3dgs members is probably high I dont think that most of them can really grasp the meaning of a claim :

Photon has no mass but it has a momentum

What ? momentum is mass by velocity isn't it ?

Hoewever this concept can be explained in simple ( but not that simple:) ) words
without evoking esoteric stuff such as standatd model or virtual particles
Actually they just make more confusion
It is much better to explain the Hystorical evolution of physical concepts
This is the only point where I dont agree with you

Getting back to the topic

In the 19th century is was already known that an electromagnetic wave can make a container explode thus there is a pressure inside
Given the electric and magnetic field you can calculate the momentum of an electromagnetic wave, which was supposed to be something different than a mechanical momentum

However this momentum can not explain the photoelectric and the Crompton effect

if a beam of light collide with a stream of electrons (or fragment of thin ice) , the electrons should oscillate about their centre of gravity
They should not be pushed away

also for this reason Einstein assumed that the radiation is atomized in order to
have a sort of particles / particle collision
Each photon carries its own momentum and quantum of energy

at this point it is evident that the , so to speak, mechanical and electromagnetic momentum, converge

Does it mean that a photon in motion has also a mass ?
Well actualy...no, but you get very close

Joey a time ago accused me to be ...a teacher

I dont mean that you a Joey dont know this things but for sure many people dont

I just try to be cooperative....that's all
Since I studied this stuff many years ago, maybe from time to time I tell also some bullshit