When the Higgs field does this, the interactions between the Higgs boson and other particles acquire their mass.

FORBES: If I Want To Look Well-Read And In The Flow, What Do I Need To Know About The Higgs Boson Discovery And Announcement?

Normally, the spin of each photon would rotate by a certain amount, thanks to its interactions with the magnetic field of the atoms.

FORBES: Scientists Beat the Heisenberg Uncertainty Principle