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ArcticMyst Security by Avery

super high speed camera and laser ????

diachi

diachi

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i was JW in school today, if you got a fast enough FPS on a camera would you be able to see the beam of the laser gradually emerging (i guess ud need about 1MFPS) ??

please reply

thanks
 





rkcstr

rkcstr

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I'm pretty sure that would be breaking the laws of physics... remember, nothing is faster than the speed of light, including a camera shutter.
 
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Ace82

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I'm sure something of that nature will be plausible in the near future by actually being able to view time much faster and replaying it much slower. They have ones now that can catch lightning, ones that can catch explosions. Light on the other hand is the fasting moving phenomenon to our knowledge, 100's of times faster then explosions or lightning (not how the arch descends from the clouds).
 
diachi

diachi

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yeah i know 300.000.000 Metres per second, but that would be so cool (and we can make light travel faster and slower remember
 
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Snytbaggen

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I've heard about some lab making it go slower, at the speed of a bicycle, but faster? :eek:
 
diachi

diachi

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yeah i read it in a news paper, they get some sort of ionised gas at a certain frequency or something and fire light through it, aparently it was so fast it left the gas before it entered (its was probably just 1 or 2 photons, but still)
 
FrothyChimp

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Light always speeds up and slows down but it never exceeds the 300,000 Km/s limit. Anytime light is not in a vacuum it is traveling slower than the speed of light. Photons will impact and be absorbed by atoms and molecules which then release them again a process which takes a finite amount of time determined by the material. I understand they have used aerogels to slow light to a crawl. But once it leaves the aerogel it's back up to speed near the speed of light.
 
FireMyLaser

FireMyLaser

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The speed of light in water is only 75% of it's speed in a vacuum. It's because water is way more dense.
Or so I've heard.
 
diachi

diachi

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the shadows are already the last things to disapear it just happens so fast we dont notice
 
Switch

Switch

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If the light would move significantly slower you would have a significant delay betweem what is going on and when it's going on.

For the camera to actually record the beam, the beam must reflect off of stuff in the air and into the camera sensor.So even if the camera could take 3 photos before the beam travels 1 foot, if the camera is at 1 foot away, the light from the beam won't even have time to reach the camera lens before it already took 3 photos.The camera would have to be way closer, and even then you wouldn't get an acurate video of whats actually going on.This is all assuming that the camera can be that fast in the first place :p
 
diachi

diachi

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;D that article daguin posted is the same one i read about speeding up light lol, thanks for that daguin, and yeah i know what you mean switch
 
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bob12345

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Actually it's very much possible. The light will move at c out of the laser then interact with dust and move towards the camera, again at c. Both of these things take a tiny amount of time. Imagine a virtual triangle made by you at one point with the camera and the laser emitting at the other end (one point is the camera, another point is the beam start/laser, and third is the end of the beam).

However, if you increase these lengths, then there is definitely a way to film an emerging beam. You would need an obscenely fast camera OR an obscenely large distance, or a little bit of both.
 
diachi

diachi

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the great distance would be easier due to having the technology to take the picture from space . but the camera idea would still work better if it were possible with the camera's available, well just have to wait 10-20 years and see what new discoveries are made
 
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