Photon and the absence of longitudinal polarization

[Awatarn]

Homework Statement

What property of the photon is responsible for the absence of longitudinal polarization?

Homework Equations

The Attempt at a Solution

I thought it is because of the presence of its angular momentum. Is it true?

 

[turin]

It is a gauge choice (depending on what you mean by the photon). See Coulomb gauge.