Fellmer said the element neon was discovered in the late 19th century and not used with glass tubes until the early 20th century. Neon light debuted in Paris in 1910, and the first neon sign was ...

Here’s a fun video by [Ashish Derhgawen], discussing the photoelectric effect of neon lamps with some simple demonstrations. Orange light makes it light! [Ashish] demonstrates the well-known ...