As the sun dips below the horizon and the light starts to dim, lucky observers may spot a rare, brief flash of emerald. This is the "green flash," which can sometimes be seen right after sunset or ...

One of those things, it turns out, is the green flash, an atmospheric optical feature that occurs when weather conditions and visibility are just right. 📺 Los Angeles news 24/7: Watch NBC4 free ...

Null explains how the atmosphere can act like a prism where the green and sometimes blue light can appear at sunset right on the upper curve of the sun as it sets into the ocean. Other times ...

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 earliest undisputed scientific record of the green flash was made by a "W. Swan" in 1865 when he saw a "dazzling emerald green" flash at sunrise over a distant mountain.

The Green Flash When the sun's disk is disappearing at sunset, or appearing at sunrise, its top sometimes momentarily turns a brilliant green. The flash results from dispersion of sunlight in air ...