According to a video shared on YouTube, a bright beam of light shone down on the pass. The beam looks almost like that of a UFO shining down on an unsuspecting victim, like what you’d see in a ...

This change in speed can cause the light to bend at the boundary between the two transparent materials. The change in direction of a beam of light as it travels from one material to another is ...

(a) Schematic of the light field creation and evolution in the focal volume of a Gaussian ultrafast laser beam irradiating in transparent dielectrics. (b) Composite structuring based on focal volume ...