When something is transparent to light, that means light passes right through it, ... Particles traveling near light speed can interact with starlight and boost it to gamma-ray energies. ...

The glow from faster-than-light particles gives us a unique way to explore the universe. Nothing can travel faster than light — in a vacuum. But when light slows down, sometimes matter can blaze ...

For certain frequencies of short-wave infrared light, most biological tissues are nearly as transparent as glass. Now, researchers have made tiny particles that can be injected into the body ...

Inspired by HG Wells' invisible man, scientists have created transparent human kidney cells. Ideally, they hope to make a layer of completely transparent skin. ... light scattering particles too.

Engineers at the Massachusetts Institute of Technology (MIT) have used ultraviolet light to create mass-producing 3-D microparticles that could be used for medical diagnostics and tissue engineering.

Physicists have created a one dimensional gas out of light particles for the first time. Studying how the photon gas behaves could help researchers discover some yet-unknown quantum optical effects.

We take for granted, today, that the Universe is transparent to light, ... It gets bombarded by other particles, including the billion-or-so photons that exist for every electron in the Universe.