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] .
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[23]
Tomorrow's picture: open space
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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]
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Site notes:
[1] archivepix.html
[2] image/1810/SupernumeraryRainbows_Entwistle_1362.jpg
[3] mailto: jentwistle yahoo .dot. com
[4] https://www.nasa.gov/image-feature/hurricane-...
[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...
[9] ap100504.html
[10] ap100807.html
[11] https://www.atoptics.co.uk/rainbows/supers.ht...
[12]
https://i.pinimg.com/originals/b3/70/3f/b3703...
[13] https://en.wikipedia.org/wiki/Rainbow#Supernu...
[14] https://www.atoptics.co.uk/rainbows/supdrsz.h...
[15] https://www.atoptics.co.uk/rainbows/supform.h...
[16] https://en.wikipedia.org/wiki/Wave_interferen...
[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/AstronomyPictureOfTh...
[21] https://plus.google.com/u/1/+AstronomyPicture...
[22] https://www.instagram.com/astronomypicturesda...
[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/apo...
[29] calendar/allyears.html
[30] /apod.rss
[31] lib/edlinks.html
[32] lib/about_apod.html
[33] http://asterisk.apod.com/discuss_apod.php?dat...
[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/jbonnel...
[38] http://www.astro.umd.edu/
[39] lib/about_apod.html#srapply
[40] https://www.nasa.gov/about/highlights/HP_Priv...
[41] https://astrophysics.gsfc.nasa.gov/
[42] https://www.nasa.gov/
[43] https://www.nasa.gov/centers/goddard/
[44] http://www.mtu.edu/
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* Origin: FIDONet - The Positronium Repository (1:393/68)
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