Photons -- do you know what they are?

[rahaverhma]

Does anybody know what a photon is? Light used to be known as electromagnetic wave till 1900, but then it's particle was made justified by photoelectric effect, Compton effect. And we know about diffraction, interference, etc. And it has no mass.

 

[Khashishi]

You should do a forum search. "What is a photon" has been asked many times.

 

[Nugatory]

Among the many threads, we have https://www.physicsforums.com/threads/what-is-a-photon.879128/
The links in the first two posts are especially informative (although they may be a bit much ofr a B-level thread).