The green flash is a rare, brief optical event of green, yellow, and sometimes blue that colors the horizon, occurring at sunrise or sunset most often in the western U.S. Refraction and dispersion ...

The following terms were defined with the assistance of Panduit Corporation, a leading manufacturer of wiring and network cabling products and Jeff Hecht, noted optical networking consultant and ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...

Rainbows, a spectacle of vibrant colours painted across the sky, are often seen as semicircles due to the horizon obstructing our view. However, these mesmerizing arcs are actually full circles formed ...

Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, Vol. 80, No. 535 (Dec. 9, 1907), pp. 28-44 (17 pages) ...

When evaluating a patient who is unhappy with his or her cataract surgery yet has good Snellen visual acuity, we should approach the patient like one who is unhappy with a new pair of glasses.

Ultrafast extreme ultraviolet (XUV) spectroscopy is a powerful technique for probing the dynamics of atoms and molecules with attosecond time resolution. However, conventional XUV absorption ...