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Bubbles... O o O o O o

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posted on Jun, 25 2012 @ 01:56 PM
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Bubbles are fascinating. I remember when I was a child, I love to play with these little soap bubbles games:



Contemplating their vivid colors as they changing with their shapes..



.....but always wondering how physics works for these, today I just have found the answer with atoptics last picture of the day:




Old style geometric optics describes their reflections but we must use wave optics to explain their colors. Surface tension forces battle to keep bubbles envelopes spherical. To understand why they exist at all needs some attention as to why certain molecules stick together while rejecting others.





Reflections: Look carefully at the reflections. There are two images. The upper one is upright and the lower inverted. The bottom picture shows the upright image most clearly. The upright image is from the bubble's front surface that acts as a convex mirror. The inverted image is from the bubble's rear surface acting as a large concave mirror.





Interference colors: The vivid iridescent and ever changing colors are from thin-film interference seen because soap bubble films are a mere few wavelengths of light across.

Imagine skylight reaching the outer bubble surface. Some is directly reflected. Some enters the film and part of that is then reflected back by the inner film surface to leave the bubble in the same direction as the directly reflected waves.

The two outgoing wave trains overlap and interfere. In some directions - and for some colors - the wave crests correspond. That particular direction and color will be bright. In other directions or colors the two outgoing waves might be out of phase and cancel. The rear bubble surface independently contributes a second set of interferences.




Source: 'Bubbleologist' creates world's largest free-floating bubble




posted on Jun, 25 2012 @ 02:00 PM
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Nice.

That Bubble Mage in the last picture is amazing.



posted on Jun, 25 2012 @ 02:14 PM
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This is a thread I posted about bubbles earlier in the season. Because it is a little off topic I don't want to go too deep into it, but I did want to direct attention to the post by SickeningTruths that contains links for experiments dealing with bubbles. I find the Dry Ice one very interesting as it allows you to see the differences of colors due to temperature. (For those who are interested my OP contains a video of the giant bubbles being made on a beach)

P.S. My thread is a dead thread, so please let it lie and comment here in order to keep this one alive.



posted on Jun, 26 2012 @ 05:17 PM
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yes I love these bubbles.. I would LOVE to some how freeze one of the monster bubbles. only way I can think to do it is..

Empty out a pool, load the floor with dry ice, and let your monster bubble land in there... could be quite epic!



posted on Jun, 26 2012 @ 05:58 PM
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Originally posted by LeTan
Nice.

That Bubble Mage in the last picture is amazing.


Lol !! Bubble Mage.


Give it about 2 years and you will see a Bubble Mage in a video game.



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