22 degrees at Van’s Beach, photo by Andrew McFarlane
Atmospheric Optics is an excellent resource for rainbows and similar phenomena. Their page on 22-degree halos says:
22º radius halos are visible all over the world and throughout the year. Look out for them (eye care!) whenever the sky is wisped or hazed with thin cirrus clouds. These clouds are cold and contain ice crystals in even the hottest climes.
The halo is large. Stretch out the fingers of your hand at arms length. The tips of the thumb and little finger then subtend roughly 20°. Place your thumb over the the sun and the halo will be near the little finger tip. The halo is always the same diameter regardless of its position in the sky. Sometimes only parts of the complete circle are visible.
Much smaller coloured rings around the sun or moon are a corona produced by water droplets rather than ice crystals.
Lots more at Atmospheric Optics!
See the photo bigger and view more on my Instagram.
More rainbows, sundogs, etc. on Michigan in Pictures – seriously cool stuff in here folks!
Rainbow and fog bank over the Pictured Rocks National Lakeshore, photo by Ann Fisher
May you have all the happiness
And luck that life can hold
And at the end of your rainbows
May you find a pot of gold.
~ Old Irish Blessing
A very happy St. Patrick’s Day and health & good fortune to you all!
View Ann’s photo background bigtacular and see more in her 2016 UP slideshow.
Lots more St. Patrick’s Day on Michigan in Pictures!
Rainbow at Soo Locks, photo by kdclarkfarm
Diane says that everyone was in awe at this rainbow apparently waiting its turn for the Soo Locks in late September.
View her photo background bigilicious and see more in her Freighters and the St. Clair River slideshow.
More rainbows and more Soo Locks on Michigan in Pictures.
Otherside of the Tail, photo by John Rothwell
Be thou the rainbow in the storms of life.
The evening beam that smiles the clouds away,
and tints tomorrow with prophetic ray.
View John’s photo background bigilicious and see more in his slideshow.
More summer wallpaper on Michigan in Pictures.
The best rainbow I’ve ever seen last night over Frankfort, photo by Noah Sorensen
Atmospheric Optics from the UK is far and away the best website for rainbow science as well as other atmospheric optical phenomena. Regarding primary rainbows as seen in Noah’s photo from Frankfort, they say:
To see a rainbow we need sunshine and falling rain. Rainbows are rarer than might be thought … Halos occur much more frequently.
Early morning and late afternoon are the best times to see them because the sun must not be too high. Rainbows are always opposite the sun and their centres are below the horizon at the the antisolar point. The lower the sun the higher is the bow.
Red is always outermost in the primary bow with orange, yellow, green and blue within. Occasionally, when the raindrops are small, fainter supernumerary arcs of electric greens, pinks and purples lie just inside the main bow.
A rainbow is not just a set of coloured rings. The sky inside is bright because raindrops direct light there too. The primary bow is a shining disk brightening very strongly towards its rim.
View Noah’s photo background bigilicious, see more in his slideshow, and be sure to follow him on Instagram!
Lots more rainbow information and more summer wallpaper on Michigan in Pictures!
The End of the Rainbow, photo by T P M
Thomas says that he got to the end of the rainbow, but no Pot ‘O Gold. He took it along the Breezeway in northwest lower Michigan near East Jordan Michigan. According to the Breezeway website, which Thomas is involved with and links to from his Flickr profile:
The “Breezeway” – a rural ride along C-48 from Atwood (U.S. 31) through Ellsworth & East Jordan, and ending in Boyne Falls (U.S. 131) – boasts scenic overlooks, great motorcycle & bicycle rides, recreational amenities galore, working farms & orchards, artist galleries & studios, resale shops, lodging facilities (cottages, campgrounds, B&Bs, motels, and a resort), retail and service businesses with superb customer service, and an epicurean’s selection of dining choices along the route.
View his photo background bigtacular and see more in his Sites Along the Breezway slideshow.
Lots more about rainbows on Michigan in Pictures!
Double Rainbow, photo by Your Hometown Photography
I simply love Atmospheric Optics for nearly everything about lights in the sky. Regarding secondary rainbows or “double rainbows” they say that the secondary is nearly always fainter than the primary, with colors reversed and more widely separated:
Light can be reflected more than once inside a raindrop. Rays escaping after two reflections make a secondary bow.
The secondary has a radius of 51º and lies some 9º outside the primary bow. It is broader, 1.8X the width of the primary, and its colours are reversed so that the reds of the two bows always face one another. The secondary has 43% of the total brightness of the primary but its surface brightness is lower than that because its light is spread over its greater angular extent. The primary and secondary are are concentric, sharing the antisolar point for a center.
About this particular rainbow from April 2, 2016, Gerry writes: “Double rainbow from the other night after the storms. The weather in Michigan can change quickly, from rainbows to snow. Yep, that’s Michigan.”
Indeed. View her photo bigger and follow Your Hometown Photography on Facebook for more.
More rainbows on Michigan in Pictures.