Watch on YouTube. There are two beams of light eminating from the reflector above the locked door. You're given a clue as for what to do by Kassandra, who's using an Isu device to point the ...

Electrons reveal light. To image the motion of wavefronts, a team of researchers set up a very clever experiment. First, the surface plasmons were generated in gold using an extremely short pulse ...

Free electron lasers (FELs) have proven their worth, but next-generation light sources will have to do better than produce ultrabright x-ray pulses 100 or so times a second. What's needed is ...