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Light at 10 trillion frames per second.
<video controls autoplay loop> <source src="https://diqn32j8nouaz.cloudfront.net/light_10trill_fps.mp4" type="video/mp4"> Your browser does not support the video tag. </video>
Previously:
https://www.homemadetools.net/forum/...312#post211550
https://www.homemadetools.net/forum/...257#post204042
https://www.homemadetools.net/forum/...953#post202790
https://www.homemadetools.net/forum/...395#post208578
https://www.homemadetools.net/forum/...057#post157223
Interesting, here is a short extra, extra, read all about it Chech scientist capture light Well almost that is.
https://techcrunch.com/2018/10/12/at...times%20faster.
Fascinating stuff.Quote:
Originally Posted by Frank S
Just FYI, I was not able access that link on my 2012 Mac with 10.12.6 and Safari Version 12.1.2 (12607.3.10)
I also have FireFox 106.0.2 (64-bit) that worked fine with the link.
I too run FireFox in their latest write, on a 2013 lenovo (IBM).
It's weird entertainment, opening sites that recommend Chrome, MS and other browsers; there are few that won't run. I figure those are designed to phish info, I ain't playing that Homie. Nothing useful on the net that can't be found elsewhere, that will countercheck easily. I've been declared closet Luddite, correcting them as I'm merely wary.
More on this photography technique here...
https://www.caltech.edu/about/news/u...-and-phenomena
Just to put things in perspective...
The speed of light is approximately one foot per nanosecond (thank Admiral Grace Hopper for that handy relation)
According to the counter in the upper left of the video, the sequence lasts about 30 picoseconds
30 picoseconds = 0.03 nanoseconds
So, in one increment, the light moves about 0.03 feet = 0.36 in = 9.1 mm
So if I was trying to capture 30 picoseconds of light with an opened end wrench my 9mm wrench would be too small and my missing 10mm wrenches would be too large. to put it in another perspective a 9mm projectile should pass safely through a 30-picosecond long pause in a of a stream of light that is assuming the projectile were also slipping sideways at the same relative speed.Quote:
Originally Posted by mklotz
That Sameri slicing the baseball might have a better chance than my bullet
It is a fascinating thing to think about.
How far does light travel in 1 trillionth of a second?
Dividing by 1000 (two times)
186,000 miles per second = 186 miles per 0.001 second = 0.186 miles per 0.000,001 second
Convert to feet —> 0.186 x 5280 =982.08 feet per 0.000,001 second
Divide by 1000 (3rd time)—> 0.98208 feet per 0.000,000,001 second
Convert to inches — > 0.98208 X 12= 11.78496 inch per 0.000,000,001 second
Divide by 1000 (4th time)—> 0.01178496 = inch per 0.000,000,000,001 second
Times 30 —> 0.01178496 x 30 = 0.3535488 inch = 8.98013952 mm
But we won't argue about 0.1 mm :)
It does boggle my mind to comprehend these things even after someone has done it already. For example, in 1676, the Danish astronomer Ole Roemer (1644–1710) became the first person to measure the speed of light. He did not get it exactly right due to some incorrect assumptions, but he was certainly close for his time.
In addition, what about a camera that can show 70 trillion frames per second. So difficult to imagine dividing something as small as a second into a million, let alone a billion or trillion or 70 trillion.
While we are talking about "crazy" things, how do they know that 10 picoseconds after the Big Bang – electromagnetism separated from the other fundamental forces??
"While we are talking about "crazy" things, how do they know that 10 picoseconds after the Big Bang – electromagnetism separated from the other fundamental forces??"
Uh, maybe someone was floating just outside of the universe and watched it happen then passed it down all these billions of years, Makes about as much sense to me as someone stating there is no possibility there being other universes or that one moment there was nothing and in the next moment BANG the universe appeared out of nothing.
A lot easier when you use metric; you can do it in your head...Quote:
Originally Posted by hemmjo
speed of light = 3E8 m/sec = 3E-4 m/picosecond
a meter is 1000 mm, so 3e-4 * 1E3 = 0.3 mm/picosecond so 0.3*30 = 9 mm in 30 picoseconds
Are those metric seconds, or conventional seconds?
Time is the same in the metric world as in the inferial confusion. In fact, it's one of the fundamental units of the metric system. I'm fairly sure that the "inferial second" is defined in terms of the "metric second".Quote:
Originally Posted by hemmjo
The second is defined by taking the fixed numerical value of the cesium frequency, the unperturbed ground-state hyperfine transition frequency of the cesium-133 atom, to be 9,192,631,770 when expressed in the unit Hz, which is equal to s-1.