When an intense laser pulse hits a stationary electron, it performs a trembling motion at the frequency of the light field.

In a first-of-its-kind study, scientists found that bumblebees can tell the difference between short and long light flashes, ...

The @ symbol can also appear in regular formulas outside of tables when Excel thinks you're trying to reference a single value from a range. If you see it pop up unexpectedly, it usually means Excel ...