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Laser Interferometer

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Author: s_noonan

Group: Default

Filesize: 110.98 kB

Date added: 2023-10-29

Rating: 5

Downloads: 438

Views: 160

Comments: 6

Ratings: 1

Times favored: 0

Made with: Algodoo v2.1.0

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Laser Interferometer
Last edited at 2023/10/31 09:23:24 by s_noonan
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Made detector read 116 using only clicks and arrow keys
Nice scene
I'm sure I detected some gravity waves with this scene! Nice work, s_noonan! :tup:
Thanks guys.
As someone who is soon going to be a Masters of Science in the field of Laser Technology, I appreciate seeing some accurate Laser scenes:D
For those curious, this is a Michelson interferometer. As you can see when moving the reflector, the overlapping blue and yellow springs ("Waves") rapidly alternate between "bright" and "dark" pulses, modelling wave interference. The main thing that's not accurate there is the fact that the pulses seem to visibly travel across the springs, which is caused by the springs not being the exact same "frequency". Realistically, the entire overlapping region would change color in unison.
Since interference repeats every full wavelength of a light wave, and light typically has a wavelength in the range of nanometers, you can measure distances at incredible resolutions with this principle.
Last edited at 2023/10/30 15:04:50 by FRA32
Here's a website that describes the two largest laser interferometers in the world that are used to detect gravity waves: LIGO
Last edited at 2023/10/30 16:03:45 by Xray
FRA32,

I initially made the springs equal wavelengths, but I couldn't get the bright and dark effect I was looking for. As far as "exact same frequency", that's true for a single mode stabilized laser. That may not be true for a dual mode laser with a polarizing beam splitter.

Xray,

Interesting site. Reminds me of the "capacitor barn" used for the first radio transmission across the Atlantic (I'm going from memory, so might not be true).