Visible-light astronomy Visible-light astronomy Visible-light astronomy encompasses a wide variety of observations via telescopes that are sensitive in the range of visible light (optical telescopes). Visible-light astronomy is part of optical astronomy, and differs from astronomies based on invisible types of light in the electromagnetic radiation spectrum, such as radio waves, infrared waves, ultraviolet waves, X-ray waves and gamma-ray waves. Visible light ranges from 380 to 750 nanometers in wavelength. Visible-light astronomy has existed as long as people have been looking up at the night sky, although it has since improved in its observational capabilities since the invention of the telescope, which
Invisible Light Invisible Light "Invisible Light" is a song by American band Scissor Sisters, serving as the third and final single from their third studio album "Night Work". The track, which features guest vocals by actor Sir Ian McKellen, was what lead singer Jake Shears felt should have been the first single released for "Night Work", even after going with "Fire with Fire". The video for "Invisible Light" features a woman having a series of nightmares. She sees herself being dragged into the woods by a group of men, sleeping in a boat on a river, and attending her own funeral. The