What really is a particle? How can massless particles exist? How can it still be a particle if it doesn’t have any mass?

Question

What really is a particle? How can massless particles exist? How can it still be a particle if it doesn’t have any mass?

In: 76

Answer 1

We use the word “particle” to indicate that physical properties come in discrete chunks. Photons may not have mass, but they do have a definite energy, momentum, etc. you can have 1, 2, or 3 units of light energy at s particular wavelength , but you can’t have 1.5.