"Incident light" refers to the light that falls or strikes an object or surface. It is the light that is coming towards the object, illuminating it. Full definition
Surface Plasmon resonance is an electro - magnetic wave propagating along the surface of a thin metal layer and the collective oscillation of electrons in a solid or liquid stimulated by incident light. (sciencedaily.com)
Specifically, one patent awarded to Apple details a light splitter cube that can break incident light into different color components, sending them to different sensors. (tomsguide.com)
Hydra's reflectivity (the percentage of incident light reflected from the surface) is intermediate between that of Pluto and Charon. (sciencedaily.com)