Issues

In a material with a negative dielectric constant and negative permeability, convex lenses are diverging and Cerenkov radiation is emitted backward.

Thanks to its superb sensitivity, angular resolution, and positional accuracy, NASA's Chandra x‐ray observatory has detected nearly all the individual sources that collectively make up the cosmic x‐ray background.

As the torch passes to RHIC, the heavy‐ion program at CERN takes stock of six years of Pb‐beam results.

Demand for ever faster data transmission is fueling rapid advances in fiber optic communications and a frenzied search for personnel trained in optics.

One scientist's work provides material for an entire course, covering topics ranging from hydrodynamic stability and turbulence to electrohydrodynamics and the locomotion of small organisms.

A decade after Sakharov's death, his guidance remains relevant to the nuclear perils we face in today's post‐cold war world.