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IWETHEY Home / IWETHEY Board / Science Forum / Fun exercise in an eclipse
Post #176,770
by ben_tilly
9/28/04 11:58:26 AM
Reply
New Fun exercise in an eclipse
Hold both hands out, fingers slightly apart, turn your hands so that the fingers form a cross hatch pattern. Every spot where the light falls forms into a picture of the eclipse!

Better yet, go walking in a deciduous forest and admire the eclipses dancing on the ground.

Actually we're all very familiar with the phenomena. However we're used to seeing it with a picture of an uneclipsed Sun, and so seeing it with a different image is quite surprising.

Cheers,
Ben
About the use of language: it is impossible to sharpen a pencil with a blunt axe. It is equally vain to try to do it with ten blunt axes instead. -- Edsger W. Dijkstra
Post #176,913
by static
9/29/04 12:19:52 AM
Reply
New My dad has a photo of that.
Back in the mid-70's there was an eclipse that was visible in Sydney. Dad noticed all the eclipse shapes in the dappled shade of a tree and took a photo.

Incidentally, that phenomenon is related to how holograms work.

Wade

Is it enough to love
Is it enough to breathe
Somebody rip my heart out
And leave me here to bleed
 
Is it enough to die
Somebody save my life
I'd rather be Anything but Ordinary
Please

-- "Anything but Ordinary" by Avril Lavigne.
     One of Mir's last photos (from APOD 9/26/2004) - 53 kB .jpg - (Another Scott) - (14) - Sept. 26, 2004, 01:04:18 PM EDT
         Eerily suggestive of the progression of Dumbth. -NT - (Ashton) - Sept. 26, 2004, 05:54:55 PM EDT
         What's off in the distance? -NT - (mmoffitt) - (12) - Sept. 27, 2004, 12:07:20 PM EDT
             The "stars"? Apparently Jupiter and Saturn. - (Another Scott) - (8) - Sept. 27, 2004, 12:13:27 PM EDT
                 Highly unlikely - (deSitter) - (7) - Sept. 27, 2004, 12:26:17 PM EDT
                     It is possible - (ben_tilly) - (1) - Sept. 27, 2004, 12:38:03 PM EDT
                         It's a good point - (deSitter) - Sept. 27, 2004, 01:09:55 PM EDT
                     Dunno. - (Another Scott) - (4) - Sept. 27, 2004, 12:56:22 PM EDT
                         Re: Dunno. - (deSitter) - (3) - Sept. 27, 2004, 01:13:39 PM EDT
                             What spooked me - (pwhysall) - (2) - Sept. 28, 2004, 03:39:06 AM EDT
                                 Fun exercise in an eclipse - (ben_tilly) - (1) - Sept. 28, 2004, 11:58:26 AM EDT
                                     My dad has a photo of that. - (static) - Sept. 29, 2004, 12:19:52 AM EDT
             I bet lens-flair from glimmering Mir parts/panels/etc. -NT - (tablizer) - Sept. 27, 2004, 11:38:27 PM EDT
             Them - (pwhysall) - (1) - Sept. 28, 2004, 03:38:30 AM EDT
                 My first thought, exactly. They're here. -NT - (deSitter) - Sept. 28, 2004, 03:49:40 AM EDT

Before such superhuman attainments of sustained triviality one stands in something like awe.
70 ms