A colored tube section lights up red, no matter what kind of gas is in it, she said. “There’s nothing like a neon sign to draw people’s eye,” she said. Morgan can create virtually anything ...

Neon gas glows red, while argon or mercury glow blue, and helium produces a shade of orange-tinged white. Various shades from pink to green are created by color coatings on the glass tube encasing ...

One need apply only a modest electric voltage to electrodes at the ends of a glass tube containing the inert gas and the light begins to glow. It's much easier to explain why neon isn't inert in a ...