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. But ...

With all the new, innovative types of components we see, it's interesting to note which “new” devices we routinely use are really updated versions of classics from the early days of electrical design.

THE discharge tubes used for advertising are a development of the old Geissler and Crookes tubes in which various beautiful effects were produced when evacuated tubes filled with certain gases were ...