"a light ray" is a perfectly correct and usable phrase in written English.
You can use it whenever you are referring to a beam or stream of light. For example, "He watched as the light rays of the setting sun danced on the lake."
Why is a light ray so fast and a whisper so slow?
Propagation of a light ray changes the phase of the phasor radiance.
A light ray emitted by a ToF sensor at p0 reaches scene point p after multiple bounces.
The path of a light ray along this axis is perpendicular to the surfaces and, as such, will be unchanged.
One Dutch girl in a silver jacket slid into it, like a light ray entering a blind eye.
The path of a light ray bends (refracts) when it passes from one transparent medium to another e.g., from air to glass.
Phase space captures additional angular (spatial frequency) distribution to traditional images and thus is useful for applications that put information into angles, such as light traveling along its angle or scatterer smear a light rays into multiple angles.
Then a conceptual characterization of a given phenomena which was used at an earlier stage may not be at a later stage as, for instance, the judgment 'A light-ray consists of a stream of moving particles', drawn from Newtonian optics was later replaced by 'A light-ray consists of electromagnetic waves'.
Ray tracing follows an imaginary light ray from the viewpoint through each point in a scene.
Closer to the city centre, a towering light ray, the creation of Mexican artist Rafael Lozano-Hemmer, pierced the clouds.
Bulgakov's novella charts zoologist Professor Persikov's chance discovery of a strange light ray that accelerates growth and reproduction in living creatures.
