The Light Cancelling Flashlight Experiment (Michelson Interferometer)

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In this video I talk about the idea of a light cancelling flashlight. I show you how you can make a setup in which you actually gets a light that is less bright when you shine more light on it using a Michelson Interferometer setup. Learn about the idea of light cancellation using the same ideas as noise cancellation.
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DISCLAIMER: Any experiment you try is at your own risk

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Опубликовано:

13 июн 2024

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Комментарии : 740

@TheActionLab 4 года назад

How could I not mention LIGO!

@MammaOVlogs 4 года назад

yeah what's up with that ? :)

@WakarimasenKa 4 года назад

I was just about to ask. This is the first video, Ive seen that actually has the experiment and not just a diagram.

@onthedepth69 4 года назад

Yes I also think about iy

@ArthurEKing8472 4 года назад

I was LITERALLY going to mention this... lol. You saved yourself a mildly acerbic comment, lol.

@HeenaPatel253 4 года назад

The Action Lab first

@andreimihai3658 4 года назад

My brain during exam: *information cancelling device*

@hoteny 4 года назад

I feel like this comment will go top

@ariefdharma1458 4 года назад

got a history test.... Me : Light cancellation *fursther procrastination*

@danisahawneh5435 4 года назад

Andrei Mihai lwas 6

@kirjuschaks 4 года назад

yeah man

@100ksubscriberwithnovideos8 4 года назад

😂😂😂

@abeljohnson6 4 года назад

While making this video Action lab:everybody in the house stop breathing its making the light source vibrate

@MrPablosek 4 года назад

@@HelloKittyFanMan. tf is wrong with you

@JoseGranny 4 года назад

@@HelloKittyFanMan. Laying cable

@skillhhy8707 4 года назад

@Freeway

@serious.business 4 года назад

@@HelloKittyFanMan. You're some kinda demented asshole to think women poop.

@10Carpet 2 года назад

@@serious.business i agree

@James42_ 4 года назад

This is the same setup uses at LIGO that detected gravitational waves :)))

@shlokbhakta2893 4 года назад

Bach Lan oh yeah it's crazy to think we see gravity with the power of MIRROR

@satheeshvarma.s.j. 4 года назад

I was about to comment this

@michaelblacktree 4 года назад

Now I understand how LIGO can be so sensitive.

@DanielGonzalezL 4 года назад

Makes sense, since it's so sensitive to anything at all

@Altorin 4 года назад

@@f.falkwings well, it's this setup deep under ground and spread over a kilometer but yeah it's basically the same setup The trick is the bigger you make it the more sensitive it is, the one at LIGO can measure differences smaller then the width of a proton

@nikhil8003a 4 года назад

Hello Action Lab!! Whenever you post a new video, it will be around 10:00 PM in INDIA and after having dinner it gives a lot of satisfaction to watch your science experiments. Thanks a lot and LOVE FROM INDIA♥️♥️

@SaebaRyo21 4 года назад

Yeah... I just watched it around midnight... and he explains greatly also

@josexavier5518 4 года назад

Same I just finished my dinner as well😂

@nikhil8003a 4 года назад

@@AnkushKun hey I'm doing arduino water level indicator using ultrasonic signals. Can you share some resources please.

@nikhil8003a 4 года назад

Thanks for your love😆😆

@ppskg1 4 года назад

Pls subscribe to Mystic Dragon EX

@rh001YT 3 года назад

There's a type of little kiosk in stores where if you stand in/under them virtually all exterior sound vanishes. Also, sound from speakers in the kiosk did not travel outside of it.

@AliYassinToma 4 года назад

A flashlight that instead of lighting makes it dark ... Sooo it should be called unflashlight??? Or flashdark ... ??

@bairfamilyfarm1336 4 года назад

Is a "flashlight" really an "unflashdark"?

@AliYassinToma 4 года назад

@@bairfamilyfarm1336 probably.. idk

@prism2451 3 года назад

There is no good word for what we call Flash light or torch. It can be called LED

@AliYassinToma 3 года назад

@@prism2451 thats why i like arabic .. there is way more vocabulary to precisely describe almost everything :/

@pleb6261 3 года назад

We already have an unflashlight or flashdark We call that opaque object in front of light source (I guess shadow is dark light, eh)

@pbp6741 4 года назад

Fabulous demo. Surprised you didn’t mention ligo after all that work.

@simenjorissen5357 4 года назад

Read the pinned comment

@pbp6741 4 года назад

simen jorissen His pinned ligo was posted a day after I mentioned it. It simply didn’t exist at the time of my comment.

@simenjorissen5357 4 года назад

@@pbp6741 sorry my bad

@Fermion. 3 года назад

Could make one hell of a security system with how sensitive that setup is.

@villentretenmerth11 9 месяцев назад

*bird sits on the roof* >>alarms blaring

@AttilaAsztalos 9 месяцев назад

Sure, if you're trying to detect a burglary happening in your neighbor's house...

@Fermion. 9 месяцев назад

@@AttilaAsztalos I was thinking more of a military base/nuclear plant type perimeter seismic defense system. I'm pretty sure a physicist could triangulate the exact coordinates of the slightest movements, based on variations in the interference patterns, then pass that data off to a programmer's software, which would automate the relevant security cameras to investigate, and deploy armed drones to intercept a minor threat, or send alerts human security personnel, if more lethal countermeasures are necessary to neutralize a major threat. This would be way too sensitive for normal civilian use. Every step in the home, speaker bass drop, kitchen appliance, car that passes by, etc., would set off a false positive.

@AttilaAsztalos 9 месяцев назад

@@Fermion.Wow, this has gotta be a personal best at thread necromancy... ;) Anyway, LIGO detects gravitational waves with the same basic setup and it's just HILARIOUS to read up on what they need to go through to eliminate vibrations caused by, well, everything else...

@Fermion. 9 месяцев назад

@@AttilaAsztalos Ahh, you're right about LIGO. I totally forgot about that. But, the thing about that is that it would be super expensive, with the miles and miles of vacuum-sealed tunnels, and several teams of world class scientists. And yeah, I made several edits after a few drinks lol.

@nayankulkarni5131 4 года назад

3 words for you. YOU ARE AWESOME. Thanks for giving us all of this stuff!

@FacterinoCommenterino 4 года назад

Today's fact: Baked beans are actually not baked, but stewed.

@dio66791 4 года назад

@George Costarica h

@punypete8724 4 года назад

@George Costarica d

@punypete7106 4 года назад

@George Costarica p

@familyguy2023 4 года назад

@George Costarica c

@thelockedbox2095 4 года назад

WHAT?

@panzerofthelake4460 4 года назад

What I have learned: my brain don't want to.

@ThePrufessa 4 года назад

Yeah this one was hard to follow. I will have to watch it again because I'm completely lost right now.

@defaultkid99 4 года назад

N i x D a

@DanielGainesDanno115 4 года назад

Love these experiments. I love learning new things that this guy teaches on science. I love that he makes it fun as well as educational.

@vinayaka9438 4 года назад

Any odd multiple of half wavelength actually.. Since moving by an even multiple will lead to constructive interference..

@supernovactc3283 4 года назад

(2n+1) * wavelength n€ Z

@poopsiexpants 4 года назад

Disappointed. Still waiting for the flash-shadow like on the thumbnail. 😂

@shakilahmed6870 4 года назад

yes

@sureshkumarthottempudi8298 4 года назад

I too

@cryptfire3158 4 года назад

i know heh. Like.. couldn't he just tell us he couldn't do it, rather then making us watch the whole video?

@prism2451 3 года назад

@@cryptfire3158 all of his thumbnails are like that. I still like him

@oerlikon20mm29 3 года назад

you cant do that lol, thats like making a negative sound wave... how the hell does that work. would be hella cool tho, i would love to see it happen

@Bunny-zq9su 4 года назад

Which would absorb more heat when left in the sun: a computer screen displaying black or a computer screen displaying white? Also, do different colors display at different temperatures on computers? (Not left in the sun, but just on its own indoors.) Does blue display any warmer than red for example?

@AlexDicy 4 года назад

@Musketeer Oliver ...............

@TankYou90 4 года назад

interesting

@robstamm60 4 года назад

Thats a really interesting question. If we use an old phone with an LCD and no way to turn down the background illumination of the screen then a black screen will definitely heat up more because the lcd crystals absorb nearly all of the sunlight+backlight. If we use a modern OLED display it gets a bit more difficult to answer this question but we can generally say that a completely black oled screen doesn't use ANY current so the device will not heat up from energy losses from the OLEDS and I can't think of any reason that an oled will absorb less sunlight if it is turned on (especially in the IR-range where the OLED doesn't emit light anyway)

@Bleepbleepblorbus 4 года назад

It's a close one.

@Justin-lc8wk 4 года назад

@@redtoxic8701 on lcd there is one light source with layers that make color so brightness on lcd is heat but on oleds? im not sure.

@parasar1980 4 года назад

Love from INDIA The Action Lab!!! ❤️❤️❤️

@barkatrathod9301 4 года назад

Subscribed your channel

@bran1039 4 года назад

i can tell by your name btw cool name

@parasar1980 4 года назад

@@bran1039 THANKS! btw that's my father's name...mine is Rishabh Raj...aka... RR

@parasar1980 4 года назад

@@barkatrathod9301 hey! Thanks!

@bran1039 4 года назад

@Dhananjay Parasar oo cooler name

@dellhpfree 4 года назад

You are an amazing teacher. Keep up the great work. Thank you 🙏.

@ReesePuffSwag 4 года назад

Really cool aspect to this experiment; you talked about how doing something as simple as walking on the floor can change the phase between two light sources but temperature differences actually do the same thing so if you breathed over one light source you could actually see a phase difference.

@sourabhperuri1698 4 года назад

This video is exactly the reason why i got to know your channel. I had this doubt for a long time and when i searched it in youtube, i got your other videos on additive mixing, subtractive mixing and those on 'if black and white are colours'. Now my doubt is finally cleared. But i can't stop following your channel as your experiments are on the next level. Thanks a lot. It is actually surprising to know that you came to this height from crushing a golf ball on hydraulic press.

@christianterrill3503 4 года назад

Blowing my mind again!

@alexanderpoltzer8885 4 года назад

I knew about how noise cancelation works with offsetting sound waves by 180 degrees. But I wondered if light cancelation was possible. Whe I thought about it I realized how hard it would be but am very happy now to see it explained in a video. Thank you!

@y33t23 4 года назад

"Everybody please don't take a shit now it disturbs my not-light."

@ryantwombly720 4 года назад

Thank you soooo much. This is a wonderful visualization of concepts that come up so frequently in science and science explanation. Truly a service to education.

@NC-oy8hq 3 года назад

Just watched this a second time ... the action lab is awesome. Thanks for helping me and my kid learn.

@intunemediaresources5938 3 года назад

I love your channel and you just seem like a genuinely cool dude! Much love and support man!

@waynefarrellvoiceovers Год назад

I really enjoyed that. Beautifully explained.

@xNecromancerxxx 4 года назад

YES!!! another ActionLab video!! I love it! 😊

@Krfstniper 4 года назад

As always the explanation was super clear! Thanks a lot :)

@marcularis 4 года назад

Man, you're reading my thoughts!😂 I was thinking of the exact same thing some months ago! Thank you for existing! :)

@saharshbehal8766 4 года назад

It always a gr8 experience on getting that free knowledge from you sir thanks for all the effort

@cernejr 4 года назад

I really enjoyed this video. Thank you!

@samsayshecc618 4 года назад

_Those markers screech through my heart every time..._

@edwinpj7637 4 года назад

Same here. I became extremely uncomfortable. Maybe both of us have pieces of Cat DNAs.

@filiplaskovski9993 4 года назад

Same bro

@harish5657 4 года назад

great work sir.

@JeremyMcMahan 4 года назад

Amazing video! Learning is so fun.

@b12virus63 3 года назад

ohh! now i understand that's the setup they used for gravitational wave detector ! that much of accuracy is awesome !!!

@swr1240 4 года назад

So awesome. You think of some fascinating stuff to experiment with!

@Dejoblue 4 года назад

The coolest thing about this was how sensitive it was. That was crazy! :)

@balajisriram6363 4 года назад

You are an amazing teacher

@Speeder84XL 4 года назад

Really cool! Intresting that you can make a device that sensitive to vibrations, but yet so simple.

@gamingmonkey0549 3 года назад

We don't need a flash-dark in 2021, please continue your work, we don't need it, but we want it

@Sorrywerefull 4 года назад

You are really funny in a geeky kind of way. I love it when you try doing things that you know won't work for us. Not talking about this video specifically.

@mikewest3108 3 года назад

That's a very cool experiment.

@aaardvaaark 4 года назад

Awesome video, as always.

@fullglorywr8322 4 года назад

Wow. This channel has put science into so many of my twin brother and my comic characters that we make. There’s a creature that has light cancelling eyes. Looks like it’s eye structure will have to be completely different than what I originally wanted it to look. One on the front which emits a light cancelling glow, 2 on the sides and on on the back of the head to receive light. Which goes into a bioliogical beam splitter type organ.

@harishs7384 4 года назад

Tq fr the video, action lab love❤️

@stickmandaninacan 4 года назад

this is basically a mini version of LIGO, they use the same mechanic to measure the tiny mirror movements to detect the gravitational waves

@aeroant 4 года назад

So well explained! one of your best videos! I think I know how gravity waves were measured now :D

@DXPAlien 4 года назад

u explained it well sir

@hackandtech24 3 года назад

i didnt think this video would be this cool. nice

@chillaxter13 4 года назад

Love the idea of this! These are the experiments I watch this channel for. We do need to get you a nice, large white board though...

@fasiuddiin 4 года назад

This guy is insanely amazing

@intendedviewer922 4 года назад

Another , excellent , video

@TheGreenMedicine420 4 года назад

This is awesome.

@jaikumar848 4 года назад

Hi action lab! Could you please make more videos on quantum mechanics stuffs...like entangled photons,eraser experiment etc !! Btw great video as always

@blaksand1 3 года назад

Thank you

@StefanReich 4 года назад

Such a good channel

@jimmy-jamesolivier-mccutch2126 4 года назад

i love this channel thx

@danigaming4139 4 года назад

Very amazing,ilove what you were doing i learned something new bout this video Keep it up bru....👍👍👍👍👍👍👍👍👍👍👍

@MaestroLives 4 года назад

Great video dude

@user-we6lw3ff8m 4 года назад

One of the best things i have seen on RU-vid . Keep up this good work man, congratulations.

@spenceranonodium711 4 года назад

Loved the video, had a different idea when I read the title. Not disappointed though lol

@raghavendramirji9510 4 года назад

I have been wondering about these since childhood 😁

@karma_yogi_42 4 года назад

This was a good episode

@AwesomeTheAsim 4 года назад

Oh my god! That's my idea and I have been trying to make it possible. But it looks like it is impossible unless you put a black hole inside it because black hole can suck light. I am so glad you did this video

@cattybound2011 4 года назад

Hey this is a great video! Better than usual! You're a lot smarter than you sound! 😁😁😁😂❤️ J/k

@Waterdust2000 10 месяцев назад

This channel doesn't disappoint, I was hoping to see a total cancellation here of the light. What if you did this in a anti-vibration & sound dampening room? an maybe throw in the vanta black as necessary for light control.

@futuregamers7341 4 года назад

Im so sorry for your loss

@Toastmaster_5000 4 года назад

Pretty cool experiment. I wonder what would happen to some of the wave patterns if you tried using a polarizing filter.

@Techvalte 4 года назад

Nice video 😀✊

@puspamadak 4 года назад

That was great.

@taintedtree268 4 года назад

That's amazing

@sanjarimirza 3 года назад

AMAZING 🤩

@yashwantherukulla4122 4 года назад

Awsome bro ive ever seen

@obama_is_hot6 2 года назад

8:30 honestly that was the most intresting and cool part. id love a whole vid on just that alone

@knownbarkert6153 4 года назад

Your literally the science teacher of the *world*

@igorgiuseppe1862 7 месяцев назад

you also build an motion detector with this experiments... or an vibration, quite cool!

@Monoceros_323 4 года назад

Wouldn’t be a flashlight then now would it, it would be a flashdark. 🤣😂😂

@fanmaxis3004 3 года назад

Nyuk nyuk nyuk

@cinoreius6084 4 года назад

Thanks

@planeteuropa 4 года назад

Hi Action Lab... I wonder if there is any beam splitter " equivalent " for heat waves ? - to cancel out waves from two heat sources. Your thoughts on this?

@kand016 Год назад

i like the Michelson Interfometer so much

@assasinatorx325 6 месяцев назад

I never understood how to cancel light but you gave me an important information i was thinking about an extremely sensitive ground vibration sensor for my snake robot and your laser fringe vibration gave an idea to make one

@silverxart8126 4 года назад

This is cool

@Pindrop22 4 года назад

That was great

@thatguycalledgranth4364 4 года назад

You are awesome

@GrowingAnswers 4 года назад

I think the vibration sensitivity shows a good demonstration of how high power telescopes need to be vibration isolated. People who have never used a telescope wouldn’t understand that. This device shows a good representation of that. The difference though is that a telescope usually takes longer to settle out after the vibration starts.

@dixieandbuck 3 года назад

This seems sorta similar to the polarized sunglasses trick.

@Slayermunch 4 года назад

I love your channel a lot!! I am liking all the videos. 😋🙂 you’re awesome 😎 please make a video on how to see photons in light. Or atoms of anything .

@Demnus 4 года назад

By the way, if you record amount of oscillation of the interference pattern, would it produce sound? Might it be the way to make supersensitive microphone?

@davidwuhrer6704 3 года назад

Yes. It is called a laser microphone, and it is used to listen in on people's conversations by the vibrations of their windows.

@heideknight9122 3 года назад

Wow this is really cool. Too sensitive of a system for everyday use though.

@koreboredom4302 4 года назад

People on the street: "hey where are my sunglasses?" Me:

@fanmaxis3004 3 года назад

ZZ Top:

@shade5554 4 года назад

Wow, this could be a great movement sensor.

@pulsar9354 4 года назад

Dark Shade yes they should make a gravitational waves sensor using this system.

@naheddhh 3 года назад

great !!!

@jandrei32 4 года назад

I met James today at lagoon, big surprise :D

@SuperGattan 4 года назад

Excellent explanation..... so in theory can we make a NAND gate or a Boolean function from this phenomenon?

@ksp-crafter5907 4 года назад

Please try the "Delayed Choice Quantum Eraser" experiment - it would be so cool because it is a kind of time travel device (for subatomic particles at least)! @The Action Lab