A new twist in the properties of light

Light has some well-established dynamical properties that have defined our understanding of electromagnetic radiation for over a century. Two of the most fundamental of these properties are that photons of light carry momentum in the direction of propagation, and a ‘spin’ about the propagation axis defined by the electromagnetic wave’s circular polarization. These properties play critical roles in a range of everyday phenomena and experimental interactions between light and matter.

from Phys.org: Physics News http://ift.tt/1gXfwm7

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