Helium-neon lasers may be little more than glorified neon signs, but there’s just something about that glowing glass tube that makes the whole process of stimulated emission easier to understand.

699), Prof. Collie and Mr. Patterson have directed attention to numerous approximate coincidences between lines of neon and hydrogen, from which it is presumably intended to be inferred that ...

To investigate how helium behaves inside Earth, the researchers turned to an experimental technique that simulates the intense conditions of the planet’s deep interior. By using a laser-heated ...