News Flash Images the Amazing Does It Again

Orange sunset over dark ocean with small, wide green stripe right on horizon.
Light-green flash over the N Sea, Belgium. Epitome via Hans Hillewaert.

People tell me when I go to the embankment to look at the sunset to try to see a greenish flash. What is a green flash?

The green wink is an optical phenomenon that you can see before long afterward dusk or before sunrise. It happens when the sun is nigh entirely beneath the horizon, with the barest edge of the sun – the upper edge – nevertheless visible. For a 2d or two, that upper rim of the dominicus will appear green in color. It's a brief flash of the color green – the legendary green flash. It'south really quite heady to come across, especially if you've been looking for 1.

It'south said that in one case you've seen a dark-green wink, yous'll never again go wrong in matters of the heart.

Blue sea, pink sky, tugboat in distance, narrow greenish stripe on horizon.
Jim Grant photographed this green flash on April 27, 2012, off the coast of San Diego.
Sea of clouds, top of setting sun with tiny green spot on top against orange sunset sky.
Green flash on setting sun observed from a mountain. Paradigm via Amiteshomar/Wikimedia Eatables.
Silhouette of tower and trees against wide setting sun with green at top.
Greenish wink atop sun pyramid via Colin Legg.

How tin yous see a dark-green flash? Yous just demand two things:

one. A clear 24-hour interval with no haze or deject on the horizon.

2. A distant horizon – and a distinct border to the horizon. You can see the green wink from a mountaintop or high building. But information technology's most oft seen over the bounding main, by people on beaches or in boats.

Important tip: Don't look at the sunday until information technology is nigh entirely beneath the horizon. If you exercise, yous will dazzle (or damage) your optics and ruin your green flash chances for that day.

Since you lot need to know exactly where to look along the horizon, and since most of united states of america aren't up before dawn, light-green flashes are nigh often seen afterwards sunset. But diligent observers tin see them before dawn, likewise. And, although they're near often seen over the bounding main, you can see dark-green flashes over land, also, if your horizon is far enough away.

What is the greenish ray? The flash tin be similar a flame that shoots above the horizon. In that case, it's chosen a light-green ray. I've seen lots of green flashes, only never a light-green ray, although I was in one case walking on a beach in Mexico and turned away just as my companion saw i. I did not detect whatsoever photos of flamelike green rays (if y'all know of one, let me know), but the photo below suggests the ancestry of a ray.

Bright orange-yellow semicircle (the sun) with double elongated green spots at top.
Mock delusion (explained at Atmospheric Optics) and green flash seen from San Francisco. Prototype via Mila Zinkova/Wikimedia Commons.
Dark blue ocean, wide yellow sun with short, bright stripes above it.
Mock mirage and green flash over the Pacific, seen by Jim Grant in San Diego.

What makes a green flash? The green flash is the result of looking at the sun through a greater and greater thickness of temper equally y'all look lower and lower in the sky. Water vapor in the atmosphere absorbs the yellow and orange colors in white sunlight, and air molecules scatter the violet light. That leaves the carmine and blue-greenish light to travel directly toward you. Almost the horizon, the sun's light is highly bent or refracted. It's as though there are two suns – a red one and a blue-light-green ane – partially roofing each other. The red one is always closest to the horizon, then when it sets or before it rises, you see but the blue-light-green disk – the green wink.

Enjoying EarthSky? Sign up for our costless daily newsletter today!

Dark sea, cloudy orange sunset sky, short green stripe right on horizon.
The elusive green wink just afterward sunset on July 29, 2014 in the East China Sea. Epitome via EarthSky Facebook friend Mike Quinn.
Almost whole yellow sun, pink at bottom, tiny green spot on top, seagulls in foreground.
Niggling light-green wink on upper rim of the sunday at sunset on November 4, 2012, captured by EarthSky Facebook friend Jim Grant in San Diego.
Short green streak between orange sky and dark sea.
View larger at EarthSky Community Photos. | Bill Miller defenseless this green flash in Sint Maarten on April 27, 2020. He wrote: "We see green flashes frequently but it is always a challenge to get a good picture of one … timing is everything." Thanks, Bill!

Bottom line: How to run into the elusive greenish flash.

charbonneauexceer.blogspot.com

Source: https://earthsky.org/earth/can-i-see-a-green-flash/

Belum ada Komentar untuk "News Flash Images the Amazing Does It Again"

Posting Komentar

Iklan Atas Artikel

Iklan Tengah Artikel 1

Iklan Tengah Artikel 2

Iklan Bawah Artikel