Did you know some of the brightest sources of light in the sky come from the regions around black holes in the centers of galaxies? It sounds a little contradictory, but it's true. They may not look ...
High-frequency light is useful. The higher the frequency of light, the shorter its wavelength – and the shorter the wavelength, the smaller the objects and details the light can be used to see. So ...
When researchers reviewed footage of flying insects, they saw that the bugs tilted their backs toward the source of artificial light. Imperial College London Flip on a porch light on a summer evening ...
Since its launch in late 2021, the James Webb Space Telescope (JWST) has been glimpsing some of the earliest epochs of cosmic time. Its observations have stretched cosmologists' timelines of when ...
Unfortunately, this book can't be printed from the OpenBook. Visit NAP.edu/10766 to get more information about this book, to buy it in print, or to download it as a free PDF.
The use of alternative light sources and ultra violet lighting has changed and improved drastically over the last few years. The concept, however, remains the same as the purpose of alternative light ...
Cities are artificially lit to allow humans to make use of the night. This light pollution means that stars are often barely visible in urban skies. But reduced stargazing is not the only impact of ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results