Subj : Daily APOD Report To : All From : Ben Ritchey Date : Tue Oct 02 2018 09:47:26 Astronomy Picture of the Day Astronomy Picture of the Day Discover the cosmos! [1] Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2018 October 2 [2] Supernumerary Rainbows over New Jersey Credit & Copyright: John Entwistle [3] Explanation: Yes, but can your rainbow do this? After the remnants of Hurricane Florence [4] passed over Jersey Shore [5] , New Jersey [6] , USA [7] last month, the Sun [8] came out in one direction but something quite unusual appeared in the opposite direction: a hall [9] of rainbows [10] . Over the course of a next half hour, to the delight of the photographer and his daughter, vibrant supernumerary rainbows [11] faded in and out, with at least five captured [12] in this featured single shot. Supernumerary rainbows [13] only form when falling water droplets are all nearly the same size [14] and typically less than a millimeter across. Then, sunlight will not only reflect [15] from inside the raindrops, but interfere [16] , a wave phenomenon similar to ripples on a pond [17] when a stone is thrown in. In fact, supernumerary rainbows [18] can only be explained with waves, and their noted existence in the early 1800s was considered early evidence of light's wave nature [19] . Follow APOD on: Facebook [20] , Google Plus [21] , Instagram [22] , or Twitter [23] Tomorrow's picture: open space ------------------------------------------------------------------------------- < [24] | Archive [25] | Submissions [26] | Index [27] | Search [28] | Calendar [29] | RSS [30] | Education [31] | About APOD [32] | Discuss [33] | > [34] ------------------------------------------------------------------------------- Authors & editors: Robert Nemiroff [35] (MTU [36] ) & Jerry Bonnell [37] (UMCP [38] ) NASA Official: Phillip Newman Specific rights apply [39] . NASA Web Privacy Policy and Important Notices [40] A service of: ASD [41] at NASA [42] / GSFC [43] & Michigan Tech. U. [44] ---------- Site notes: [1] archivepix.html [2] image/1810/SupernumeraryRainbows_Entwistle_1362.jpg [3] mailto: jentwistle @at@ yahoo .dot. com [4] https://www.nasa.gov/image-feature/hurricane-florence [5] https://www.youtube.com/watch?v=HYmDIonswmY [6] https://en.wikipedia.org/wiki/New_Jersey [7] https://en.wikipedia.org/wiki/United_States [8] https://solarsystem.nasa.gov/solar-system/sun/in-depth/ [9] ap100504.html [10] ap100807.html [11] https://www.atoptics.co.uk/rainbows/supers.htm [12] https://i.pinimg.com/originals/b3/70/3f/b3703f3c9b83bf4ffa1f75294695795a.jpg [13] https://en.wikipedia.org/wiki/Rainbow#Supernumerary [14] https://www.atoptics.co.uk/rainbows/supdrsz.htm [15] https://www.atoptics.co.uk/rainbows/supform.htm [16] https://en.wikipedia.org/wiki/Wave_interference [17] https://www.youtube.com/watch?v=T9QwiBFN9gI [18] https://www.atoptics.co.uk/fza82.htm [19] https://www.youtube.com/watch?v=IRBfpBPELmE [20] https://www.facebook.com/AstronomyPictureOfTheDay [21] https://plus.google.com/u/1/+AstronomyPictureOfTheDay [22] https://www.instagram.com/astronomypicturesdaily/ [23] http://twitter.com/apod/ [24] ap181001.html [25] archivepix.html [26] lib/apsubmit2015.html [27] lib/aptree.html [28] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search [29] calendar/allyears.html [30] /apod.rss [31] lib/edlinks.html [32] lib/about_apod.html [33] http://asterisk.apod.com/discuss_apod.php?date=181002 [34] ap181003.html [35] http://www.phy.mtu.edu/faculty/Nemiroff.html [36] http://www.phy.mtu.edu/ [37] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html [38] http://www.astro.umd.edu/ [39] lib/about_apod.html#srapply [40] https://www.nasa.gov/about/highlights/HP_Privacy.html [41] https://astrophysics.gsfc.nasa.gov/ [42] https://www.nasa.gov/ [43] https://www.nasa.gov/centers/goddard/ [44] http://www.mtu.edu/ --- Mystic BBS v1.12 A39 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .