Although commonly referred to as the “check-engine light,” some cars may instead display the message “Service Engine Soon,” or show a yellow or orange outline of an engine, perhaps with ...

An odd solid that can flow like a fluid has been created from light for the first time. Studying it will help researchers better understand exotic quantum states of matter. “We actually made lig ...

Slow light refers to light with a low group velocity, described by a gentle slope, dω/dk, in an ω–k dispersion diagram, as shown in Fig. 3, where ω is the angular frequency and k is the ...