Researchers have developed a novel experimental platform to measure the electric fields of light trapped between two mirrors ...

Röntgen was originally trying to find out whether cathode light rays - invisible streams of electrons, that could only be seen in glass vacuum tubes - could actually pass through the glass.

When they married in 1895, X-rays had just been invented in Germany. The ‘x’ in X-ray stood for ‘invisible light’, an unknown force at the time. The Curies, together with another French scientist ...