The phrase "direction of the light" refers to the path or angle from which light is coming or shining. It indicates the way in which light is traveling or being emitted from a source. Full definition
The 8 Plus also provides 2x optical zoom and Portrait Lighting, a beta feature that allows you to change the strength and direction of the light source before hitting the shutter. (tomsguide.com)
The shape and direction of the light trace help determine the cosmic ray's direction and indicate what kind of particle the original cosmic ray might have been. (auger.org)
In a recent theoretical paper (Extraordinary momentum and spin in evanescent waves Konstantin Y. Bliokh, Aleksandr Y. Bekshaev, Franco Nori Nature Communications, 2014 DOI: 10.1038 / ncomms4300), a group from the RIKEN Center for Emergent Matter Science in Japan showed that momentum density in non-uniform optical fields has an unusual component, which is orthogonal to the propagation direction of light and is proportional to the optical spin, which means the degree of circular polarization. (sciencedaily.com)