IN spectroscopic literature there are many casual references to a continuous background in the vacuum tube spectra of various gases, such as oxygen, chlorine, etc. Usually these observations appear to ...

Visible light is a form of electromagnetic (EM) radiation, as are radio waves, infrared radiation, ultraviolet radiation, X-rays and microwaves. Generally, visible light is defined as the wavelengths ...

Amanda Bauer works for the Australian Astronomical Observatory. She previously received funding from the Australian Research Council. When you look up on a clear night and see stars, what are you ...