Clubs and businesses in Wisconsin offer rifle sight-ins to hunters prior to the annual gun deer hunting season.

Binoculars are listed by size spec, where the first number is magnification and the second is objective lens diameter.

Abstract: Electromagnetic vortex waves carrying orbital angular momentum (OAM) have been receiving increasing attention in different domains, from optics to microwave, due to their “phase twists” ...

For more than 50 years, scientists have dreamed of seeing the hidden patterns that govern the motion of nonlinear waves—the ...