A set of five gas discharge tubes are arranged such that when they are touched with a Tesla coil, their characteristically colored emission spectra are seen. The Tesla coil can burn your skin on ...

The white light LED has a broad spectrum so one can explore a larger ... In this example I’ve loaded in two images, a photo of a CFL spectrum and a photo of the emission spectrum of quinine sulfate.

Lasers add a mechanism for optical feedback, such as mirrors, that stimulates further emission and generates a high-intensity beam of radiation. Intrinsically polarized white-light emission is ...