Who Invented Night Vision, and How Does it Work?

[@TodayIFoundOut]

Buy your DNA kit here: bit.ly/TIFO2. Use Coupon code “ TIFO” for free shipping. Thanks to MyHeritage for sponsoring the video.

[@Butros1]

any guarantee our dna would be sold to black water

[@austenpowers]

Wicked , cheers ❤. Ref# the vod. 👍

[@PindleofKujata]

2% Western Asian? Looks like somebody got that Genghis Khan in them.

[@bghiggy]

The way night vision works is by turning photons into electrons by focusing them with the objective lense and making them hit a photocathode, and then those electrons are multiplied tens of thousands of times by a microchannel plate, and then those electrons are turned back into photons when they hit a phosphor screen that will glow whatever color the screen is designed for. Green phosphor was used for a long time because humans eyes are most sensitive to green light but recently white phosphor has been used because we are able to have better contrast with black and white (even though white phosphor is sort of blueish). You could actually make the phosphor screen any color you want but some colors are more useful than others.

[@robcandy9273]

22 minutes of our lives saved we thank you

[@meh7348]

Listen to Simon explain it is still far more interesting, sorry bud.

[@robcandy9273]

@@meh7348 fair fair he's fun to listen to but you know sometimes you just want the answer though that's more a rant about KZbinrs in general 😅 I feel kinda guilty now

[@travislupum]

I have green and white and I love my white phos unit but my green sees into much darker conditions

[@michaelr.5676]

Thank you

[@xbreezybx]

Hershel didn't just randomly decide to place an extra thermometer at the end of the split prism, or have some sort of genius 6th sense to do so. The additional thermometer was meant to be a control for the experiment to compare the difference in heat gained in each color with the ambient temperature of the room. Great example of a perfectly disciplined experiment gone wrong leading to an unexpected and fascinating discovery. Bingo bongo, eureka we have science.

[@dionh70]

As has been said before, the most exciting phrase in science is not "Eureka!" but rather "Hmmm, that's weird...."

[@sammylacks4937]

Awesome video but the find your linage package is going to make your DNA info available to whoever wherever for whatever. Don't ever.

[@aerions]

Gen 3 night vision is one of the coolest things I own besides my telescopes... Got a 2008 autogated pvs 7 (device seen at 19:42) a few months ago and its taken stargazing to the next level along with other nighttime activities. The nighttime sky in rural locations is just straight up addicting. I've even driven on the highway with my pvs7 when its rainy at night because this literally helps with visibility even w headlights still on. I feel i have definitely gotten $1500 of fun out of this already and this thing should last for years to come!

[@Shoelessjoe78]

About ten years of you take care of it and store it properly. Usage is also a factor but I can't imagine you "burning it out".

[@aerions]

@@Shoelessjoe78yep its in good hands, run lithium batteries to avoid leaks etc put cap on when not used. its also nice to have a modern gated tube for more peace of mind during usage. I also suspect my image intensifier tube was barely used because of a couple things along with its manufacture date and being a pvs 7 intensifier tube. lol probably sat in some national guard armory til they got issued pvs 14's . hopefully this lasts more than 10 years but 10 would be nice

[@bghiggy]

Gotta upgrade to a white phosphor pvs14 or dual tubes one of these days. The difference between a old school pvs7 and a modern pvs14 is unreal. Much higher resolution, less noise, more contrast, and a brighter image. Plus the cool thing about a pvs14 is you can attach it to a telescope and see the universe is a whole new way

[@aerions]

@@bghiggy yea the new 14’s are nice my buddies got a wp 14 that’s what got me into this , def clearer in the super dark areas but my 7 definitely isn’t a generation behind even side by side. You actually can attach a 7 to a telescope I have an Adapter where I take off the objective lens and can put it into the focuser without a telescope eyepiece for viewing. The eyepiece + 14 is better for showing faint stuff in a telescope

[@travislupum]

I love my pvs7's so much

[@lehammsamm]

Waiting for the inevitable "who's this new guy?" comments from people not paying attention to the fact that Dave explains how long he's been here in the ad read, let alone all the videos he's been in already. 😅😂 Thanks for all of the education over the years Dave and Simon! Haven't skipped a video yet! I've learned more from you guys than I think I did in all my years of schooling.

[@TodayIFoundOut]

Thanks for sticking with us all this time. :-) -Daven

[@wesleymorris6862]

​@TodayIFoundOut is that a typo or have I been mis-hearing Dave for the last few years?????

[@curtislindsey1736]

His name is definitely Daven. Easy mistake ​@@wesleymorris6862

[@brianwhorton5619]

He's Daven, I can confirm

[@Pylon069]

I'm not saying new, again I say more

[@richardderuiter4612]

FLIR is also used by firefighters to locate hot spots inside of hollow walls (standard wood constructed homes), for example. Some can also give an indication of how hot a hidden fire might be. Law enforcement and Search and Rescue also use these to find people and even pets.

[@kindlequeen8593]

Pleasantly surprised that Rochester NY (my hometown and home of my alma mater) played such a large role in the development of Night Vision Technology. 😊

[@aaronpomeroy2579]

I got so excited when you mentioned the Peltier device! My capstone design project for my mechanical engineering degree was a temperature regulating prosthetic socket that used those peltier modules. Basically they’re little white squares that when a voltage is applied, causes one side to get hot and one side to get really cold!

[@MrCashewkitty]

I hadn't use nods since the late 90s until I recently bought a high FOM, white Phos, PVS14. I was absolutely blown away at how incredibly well modern night vision works. You can literally see as far at night as you can the day. Throw in a WML with an illuminator and you can even spotlight things hidden in shadows from significant diatances. I dropped a coyote from a couple hundred meters away with my nods and laser. They are absolute game changers. Next up is thermals

[@theofficialken1755]

I calibrated Helicopter NVGs (2 lenses vs 4) when I was in the Navy. Only front and rear lenses, plastic housing, and intensifiers (like a C battery in size and shape). Just had to focus and run intensifiers test on the test set, then nitrogen backfill. Probably did 2'000 over time. Yes, we played with them in the cable braiding room, lights off diy obstacle course.

[@aerdile1]

I went to high-school with the writer of this episode. He was brilliant back then, now he is dashing & brilliant.

[@theswiv]

I am looking forward Simon telling us all about quantum physics and the wave function

[@andrewstrongman305]

The NVG's used by the Australian Army in the 90's were passive, but they featured an active mode for use in total darkness.

[@chrisbentleywalkingandrambling]

Simon told us never to use QR Codes so I'm not signing up. I believe fact boy.😂

[@Estes705]

And Dave says that MyHeritage will never sell your info. 23&me and several other DNA companies INITIALLY said that too. 😂 But when they were offered a huge chunk of change for it, they all immediately changed their policy and sold everybody's info.

[@DaleDix]

They couldn't get Simon to do the MyHeritage ad because we'd find out that he's more than us mere mortals.

[@swiftycortex]

Maybe Devon is getting the sponsor money and Simon is getting the KZbin ad money?

[@DILFDylF]

Simon gets all his money from the deep state and illuminati

[@SEAZNDragon]

Simon has done My Heritage in the past. I do think TIFO is more Daven’s baby post split.

[@jeffdroog]

It's because we would find out that a good portion of his DNA is literally made up of cocaine.

[@jonadabtheunsightly]

In any case, sponsored ad segments are usually recorded independently of the main video and inserted during editing, even on channels where all three tasks are performed by the same person.

[@jamesslick4790]

As a Pittsburgher, I think its kinda cool that Samuel Langley and Vladimir Zworykin both had worked in Pittsburgh, PA!

[@JamesPotts]

I had the chance to briefly work on a night vision project. Nothing interesting came of it, but getting to play with the NIR and "starlight" scopes was a blast.

[@francisbalfour1243]

Fun fact 8:49 This technology is still widely used today, in particular in smartphones, it's how your cameras focusing features work, the red dot next to the camera emits infrared light, which reflects off objects and bounces back to the sensor next to it, using the time taken to return to find the objects distance to properly focus the lenses to get clear inages

[@seasickviking]

The irony that "Night Vision" was basically created by a guy trying to create filters so he could look at the Sun is not lost on me... lol

[@paulis7319]

Same! Just like firearm silencers were made by the son of the man who invented machine guns and subsequently went deaf. 🤣

[@misledprops]

@@paulis7319dude 😂

[@chupacabra304]

Necessity is the mother of invention ! 😅

[@daviddavidson2357]

Infrared light was discovered that way. Though gen 1 2 and 3 night vision will amplify all light, it just includes infrared. Same with cameras, they can also see in the infrared spectrum, they just use a low pass filter to block it out. You can mod cameras like DSLRs to remove the low pass filter then use visible light blocking filters (IR filters) to take photos in the IR spectrum, which look really weird.

[@JordyValentine]

15:43 love the photo of the guy in the ghillie suit with the trashcan sized scope, not conspicuous at all 😂

[@stargazer2504]

So....I misread this as "Why is NV always green?" and I spent 22 minutes to not find out why it's green, but did enjoy the history of NV.

[@randymarsh8474]

Gold

[@Tog84two97]

As a thumbnail I swear that is what it said... I clicked on it and the name changed... I swear that's what happened... In my defense I haven't slept in almost 24 hours so it could just have been my mind messing with me...

[@anthonynowlan9765]

@@Tog84two97 The thumbnail does say why is it green though

[@Spiritus_Invictus]

They used nightvision with a red color in Vietnam. But they banned this color because the red nightvision drove many Vietnam soldiers mad. Reports kept coming in of soldiers seeing shadows and weird forms walking around in the jungle or winged demon like figures flying in the air. They all somehow materialized, vaporized in this air or followed soldiers and helicopter and they put soldiers on edge or drove them near insanity. Later they switched to green as green was considered to be the easiest color to see for prolonged periods in the dark kzbin.info/www/bejne/jmG9mop8eqadgrssi=5qD_S5RNT94Vkewk kzbin.info/www/bejne/bnTPoqCGa554iKcsi=fgg7YTiovlust_ii

[@Tog84two97]

@@Spiritus_Invictus I read an article about that and I was hoping he would go into that with more detail for this video...

[@bobd1805]

I worked for K&M Electronics that supplied the high voltage power supplies that powered the ANVIS and PVS-7 multiplier tubes We shipped thousands of them during Gulf Storm 1 in 1991. The only problem is photomultiplier technology can't see through fog or dust making infrared much more desirable. The company shut down in 2005.. PMT's also generate a flat 2 dimensional image totally lacking in depth perception. When you hear about helicopters crashing into each other at night in training exercises it is usually because the pilots lacked experience with this imaging system.

[@ZipplyZane]

Before I see the answer, my guess is this: human vision is most sensitive to green wavelengths, so it's easier to shift to that and get the most contrast.

[@Scruffy-LookingNerfHerder]

All the cool kids use white phos now, though.

[@Stratonetic]

In my opinion amber works better.

[@robwoodring9437]

So in the RGB LED lighting world, green LEDs always look more intense than the red & blue. You're saying it's our eyes' sensitivity curve that's to blame, not the LEDs' output?

[@paavobergmann4920]

@@robwoodring9437 probably both, but you can check the spec sheet of the LEDs

[@paavobergmann4920]

@@Stratonetic the microscope I work on is fitted with an amber display, and I love it for working in the dark.

[@NexxuSix]

I learned more about the Starlight scope in this episode than the military would tell me back in the day 😂😂😂

[@robwoodring9437]

Depending on what years you were in, it might've just been because it was Classified AF. "Here's what the knobs do. Go hunt the enemy with it. The rest is need-to-know only"

[@jeffdroog]

Because the military doesn't know how or why anything works the way it does lol They just mindlessly use stuff.You don't need to know why a gun works to use one,and same goes for pretty much everything else.

[@5echo5images]

I am an old submariner and I will tell you wikipedia had specs back in the day even our cooks with a Secret clearance were not supposed to know.

[@wingerding]

Combat assets are always made somewhat ambiguous during their infancy.

[@zredband]

Typical military secrecy. I spent years talking to site "C" never knowing who they were, where they were, or what they did, just that their communications equipment was functioning and everything was okay over there. Only to find out years later from news reporters on 9/11 that, that's where they were hiding the vice president. Point being is they only tell you just enough to get your job done.

[@JohnSmith-gb5vg]

All I know is back in 86 the company had one that the platoons would share. Gunny, says us marines get this one, and most likely the army hands them out to every private after graduating boot camp! 😂😂😂

[@Ed_Stuckey]

16:52 _and they began reaching U.S. troops in Vietnam in 1967_ I was in Vietnam in 1966. My unit received an AN/PVS-2 Starlight Scope in mid to late autumn of 1966.

[@theburrell4626]

I think Simon must be a AI computer😂, each video is uploaded 1 day ago, 1 week ago…He must be trapped in the studio! Love the videos on all your channels ❤

[@bghiggy]

There likely won't be any gen4 night vision as fusion technology (nv and thermal combined) will be more ubiquitous as it can give you far more information than image intensification alone

[@JM-wu8bh]

MyHeritage - I sent in a sample from a friend for me. I am a 40 year old black woman now. 😂

[@Erdnussflipshow]

20:07 BSP reduces the voltage of the photocathode, not the MCP. ABC (Automatic Brightness Control) lowers the voltage to the MCP, aka it lowers the gain. While BSP reduces the voltage to the photocathode to reduce sensitivity, this also causes a drop in image resolution, tubes that feature a power supply with autogating will reduce the duty cycle of the tube before reducing the photocathode voltage, so they're able to maintain a higher resolution image in highlight conditions

[@Tirebiter-v6f]

Forward looking Infrared (FLIR) was tested in Vietnam in 1967/1968 by Hughes Aircraft Company working with the US Army mounted on light observation Helicopters (OH-58's I believe). My brother in law was the Hughes engineer deployed in Vietnam working on the project.

[@tacwolf4962]

Thank you for the video! This was a really well laid out and done well with the timelines and history of the technology.

[@Satire-Gaming]

Glitterex makes the stealth coating for military vehicles

[@berthelvetic1923]

the german panther tank commander in the second war have night see tools, they call this kasskaden geraete .

[@ClassicRiki]

9:54 😂 the night Hunter badge or patch has the map of Great Britain on it that’s funny. That didn’t work out well for them.

[@sammy5576]

Our Own Devices has a really good video about night vision

[@TodayIFoundOut]

He wrote this one too. :-) -Daven

[@memyself3510]

10:00 hey! I live there!

[@baronghede2365]

Thanks for the information, Blessed Be.

[@Khalrua]

9:59 hell yeah! Let’s go Rochester

[@Shadowman...]

Night vision tech was back engineered from the Roswell crash in 1947. The alien craft had windows that illuminated the night when seen from inside.

[@wcsoblake85]

Just imagine the stacking those boys could have done with the latest gen night vision we have now.

[@ianray8823]

A channel called Riloe just did a great video about how NV and particularly the quad tube set became dare I say iconic

[@kreiner1]

I want to do my DNA, but i am scared of who i could be related to. I would never be able to resist trying to find out. Best i not check.

[@matthewsecord7641]

Daven bro...nice to seeya. Edited to correct name spelling! Looking good bro.

[@seanmorgan2356]

Dave is 2% Asian? Either one of his ancestors was hitchhiking the silk road, or he's a decendant of Ghengis Kahn.

[@TodayIFoundOut]

Aren't we all? :-) -Daven

[@andyleighton6969]

@@TodayIFoundOut Alternatively, more likely and less excitingly, low percentages are just "noise" in the results.

[@danhaywood5696]

Ive noticed throughout life, that I can see in the dark better than other people. Even though Im al.ost 60, and my vision isnt as sharp, I can still do well in the dark. Really dont like bright lights that aint sunshine though. Being able to truly see clearly in the dark, must be like a super power boost to a soldier.

[@andrewbrady3139]

I got to play with color night vision in a lab in SoCal in 2010. The problem they had was making it smaller (at the time).

[@markborn5293]

I thought the Pather tank was fitted with night vision stuff? Was that the old bunkier stuff then?

[@paavobergmann4920]

that thing was ginormous.

[@Flies2FLL]

The HUD that I have in the 767 that I fly SUCIKS! Most people like it for landings, but I haven't figured it out yet. It is all green lines....

[@davidhenry7484]

This channel is the best! Love that beard simon!

[@djaric]

That Desert Storm propaganda on the news everynight was something.

[@vaben5]

Huh. Found our own devices separate, didn't know it was one of Simon's many writers.

[@mongoose03180]

Simon, I appreciate the metric system and all of the arguments for it. But, one thing I always enjoyed was that you said both metric and imperial. Arguments for metric aside, it does me no good in my day to day life. Except watching KZbin videos that refuse to provide both. I work in a large manufacturing environment in and using metric doesn't do me any good in my day to day life... how I feel about one or the other is a non starter. I sure would appreciate it if, as well as other US viewers, you would do as you used to. Before people start trolling and hating... if you want the US to convert to metric, until it is so, it is utterly useless in day to day life. Arguing the superiority of one over the other also alienates those you wish to hear your argument. Thank you Simon. Keep up the great work! I've been watching you for...10 years? Shoot...its been a long time.

[@jamfork3871]

I thought night vision worked when you ate green crayons and strapped a cat to your rig and followed the meows!?

[@otis8888]

51 seconds after post has to be the fastest I have ever seen a video on my feed.

[@JustinWillis-gq5ew]

I like Simon's voice too.

[@lateralol]

interesting... I just happen to assemble scintillating detectors for mass spectrometers and electronic microscopes, some of them are being bought by Zeiss and sold by them to their clients

[@FrazerBoorman]

You room is resonating at 500hz; editor take note please!! I’ve also noticed on the casual criminalists channel that Simon accidentally “used the wrong mic” for a segment of a video I question why there are different setups, all giving different results. Sometimes the compression is too high, resulting in what some commenters will describe as too much treble, or echoey (short room reflections) I urge you try to stick to one setup and dial it in perfectly for consistency across every channel and every video Happy to help if you wanna message me or something

[@o.o-vt1rc]

1:29 1/3 pillaging Viking and 1/3 pillaging Brit

[@Watashi_wa_robottodesu]

There's also blue, and white for NV's not just green

[@jonadabtheunsightly]

Huh. I was assuming that the modern version would consist of a sensor (similar to the one in an infrared digital camera), some electronics, and an LCD panel.

[@SilverStarHeggisist]

Those do exist, however they are currently significantly inferior to analog night vision. The good ones are about on par with gen 1 and they lag making them ill suited for moving with them.

[@Riceball01]

As an FYI for Simon, Okinawa is pronounced Oh kee nahwah, not with an Ah sound at the beginning.b

[@armorer94]

IR night vision is now downright cheap. I bought a monocular for $100. Thermal is still quite spendy.

[@paavobergmann4920]

ordinary CCD record down to 1200nm. Just remove the IR filter and shield it from visible light.

[@corey4109]

Ghost recon introduced me to night vision

[@DILFDylF]

Splinter Cell all the way, dog

[@corey4109]

@@DILFDylF I can't deny splinter cell

[@aesop2733]

Don't lie, it was Paris Hilton

[@Barbaroossa]

Moon's out. Guns out. *grabs nerf gun*

[@ltherebellionl]

Centuries of science, decades of of and years of combat testing have culminated in my ability to go get burritos at 2 AM from Taco Bell with my headlight off and a silly hat. God bless America.

[@benhill9458]

I’m surprised the video never got into how the transition from green to white phosphor came about. Also, there was no information on going from two tubes to the GPNVG for more peripheral vision

[@Tattlebot]

There is no such transition and it's not supported by research. P45 is detrimental hype.

[@Yupppi]

No I will not donate my dna to someone who doesn't have strict policies and security about how they preserve and use the information.

[@ThebusWay76]

Our DNA is all over, I don't buy into this conspiracy theory

[@DirtDiver656]

In 2-3yrs Simon will do a video on Bridged systems 🤣🤣🤣. We are apex predators bois “Moons Out, Goons Out”

[@meahou9121]

i love it, how Simon butchers (or was it botchers, as in intentional?) the pronunciation of foreign names: @8:40 "sahlgerat". Even the google translator gets the name correctly converted into audio.

[@Krzysztof_z_Bagien]

4:45 you have your wavelenghts wrong, 700 to 1400 nanometers is "near infrared" and can easily by captured by ordinary CMOS/CCD sensor of a camera in your smartphone etc. (if you would remove IR-cut filter of course); it's radiated by objects that have temperature of at least several hundreds degrees Celsius. Human bodies and other things of similar temperature (or generally close "room temperature") radiate most of it energy in long wave infrared as you said, but its wavelenght is about 8 to 15 micrometers - and it requires special sensors to capture (that are used in thermal cameras, but that's entirely different technology than night vision). 100nm is on the other hand an extreme ultraviolet, closer to X-rays than visible light, and it's an ionising radiation (thankfully mostly absorbed by Earth's atmosphere). NV devices capture visible light and near infrared (either from enviroment, like starlight, or from external illuminator) and (I'm simplyfing a bit) turn it into a beam of electrons that is accelerated in electric field and then hits a phosphor screen that starts to glow where an electron impacts it, and that creates an image we can see; that process can amplify the light even hundreds of thousends times.

[@stuarthall8156]

The guy doing the ad sounds like he ate a cheese grater for breakfast.

[@chuckoneill2023]

My DNA. The absolute best way to make sure you're full genetic profile is available to anyone, at ant time.

[@Mrgunsngear]

🇺🇸

[@holgerackermann75]

4:47min that cannot be true. The wavelength of 800nm needs a heat source of several hundred degrees Celsius. IR thermografie cameras use 1.000 to almost 15.000 nm.

[@Jan_Seidel]

Nice video but I have one burning question. Why is the image always green? Blue might be a choice if there is an option. Green light is most intense noticed by the human eye, while blue light is not perceived as light by the human eye which makes adapt to darkness way quicker.

[@holgerackermann75]

Your pronunciation of Zielgerät and Nachtjäger is killing me😩

[@michaelhill6451]

Thermal scopes can be used in complete darkness. I truly believe they are the future of night vision.

[@Erdnussflipshow]

Showing the PVS7 at 19:41 doesn't really make sense, as the MX10130 tube of the PVS7 doesn't use a fiber optic inverter, but rather inverts it's image via the prism assembly that splits the output of the tube onto the 2 mirror to be viewed through both ocular lenses

[@lemonflavorclorox7389]

Me: What’s Technology Connection like topic doing here with mighty Simon Whistler?!?!

[@Daeraug81]

Driving with NVGs sucks, your depth perception is shot and it becomes hard to judge distance. At least from the NVGs we used when I was in the Army.

[@justinkhoury6641]

Fact.

[@Vermilion2049]

Dude, how many KZbin channels do you have!

[@montecorbit8280]

So....why are they green?? I didn't see that answered....like the thumbnail put out.

[@paavobergmann4920]

The screens that convert electron image to visible light are coated in Zn/Cd-sulfide, and that emits a green glow when hit by electrons

[@SilverStarHeggisist]

@@paavobergmann4920 and modern ones are white

[@paavobergmann4920]

@@SilverStarHeggisist Yes, because we no longer need phosphorous CdS-screens. Green has advantages, though.

[@montecorbit8280]

@@SilverStarHeggisist I think those are infrared, not night vision....both see in the dark, but by different means.

[@montecorbit8280]

@@paavobergmann4920 Thank you!!

[@Shauma_llama]

After watching so much Brain Blaze, hearing Simon being serious seems odd.

[@thespicemelange.1]

They're called nods

[@Shoelessjoe78]

The Predator. Case closed it was Aliens as usual.

[@DavidFMayerPhD]

Sir John Herschel was one of the greatest observational astronomers of all time, who belongs in the ranks of: Eratosthenes of Alexandria Aristarchus of Samos Ptolemy of Alexandria Nicolaus Copernicus Tycho Brahe Galileo Galilei Johannes Kepler Edwin Hubble Isaac Newton Charles Messier Christiaan Huygens Edmond Halley William Herschel (his father) Giovanni Domenico Cassini Henrietta Swan Leavitt Gerald Kuiper Vera Rubin

[@muffty1337]

It is always fascinating how much Simon buchers German names and the language in general. I wonder why that is... Because i am completely capable of pronouncing English names and even names of other languages without offending people.

[@Ejuicey]

Snooperscopes, snipers copes, which one was the Nintendo one?!

[@paavobergmann4920]

The Snooper featured in "Return to Castle Wolfenstein"

[@thepaperboy9009]

Interesting, but whats changed with your recording method? I'm getting a horrible echo in Simon's audio track, like he's talking into a large bucket or garbage can..

[@ScotlandsGold]

10:40 that soldier must be 15 yo max

[@KarldorisLambley]

why do the soldiers at 7.47 wish to see x-rays?

[@demonorb8634]

Night vision triangular ufos. Just bokeh effect.

[@the.amazing.spatterman]

But why is NV green though? Did I miss that somewheres? Quora: Night vision goggles are made to use green, because the human eye can distinguish more shades of green than any other colour! Me:  _..Interestinnggg.._

[@tomholroyd7519]

7:20 I see what you did there

[@tabbyplays930]

When I was in the infantry I was given a star light scope from the 60s... IT WAS GARBAGE... like wow...

[@paavobergmann4920]

My dad was a tanker in the 70´s. He said " as gunner, I could swap in this new nifty nightvision thingy, so instead of murky grey fog i would see murky green fog, but only like half the distance...."

[@hearingthesmells2500]

Simon is so famous he can’t even be arsed to do the promotion nomore 😂😂

[@TodayIFoundOut]

You have to be human for their DNA test. 😋 -Daven

[@MrT01582]

My nv is black and white 🤷

[@ifell3]

What.... Simon is on another channel, thats 5 so far right 😅

[@pilgrimdav]

This video is wrong about the wavelengths emitted by humans. It would be closer to 10 microns for the peak wavelength (rough guess). Then I think there’s a misstatement that short and mid wavelength IR is 140-800 nm which is uv, visible, and short ir. And finally all objects technically give off all wavelengths but practically the peak wavelength is determined by the temperature for a perfect black body.