Love this fact!!!

Big Bang Theory did this on the show.

Can you find someone to get me connected to NASA I'm trying to get a job. Got a few qualifications

@@trapsquad593 did you try their website?

Using that retro reflector on the moon we know that the Moon is moving away from Earth at the blistering speed of.... 1.5in per year.

For me in particular, I am terrified of roads that don't have a shoulder lane to tell me where the road ends. Sometimes nights are so pitch black that my headlights aren't enough to tell me if that black space in front of me is more asphalt or if it's a cliff I'm about to drive off from - have come across several such roads when traveling to LA...

I'm pretty sure that my little city (Poughkeepsie, New York) uses powdered sugar to paint our road lines, since it's all worn out within a few months of unprofessional application.

I’m a transportation Civil Engineer in Illinois so I’m not going to speak for any other state here, but we’re actively installing the water proof lane lines with black contrast around the white in all new tollway projects. The issue with these types of lane lines that wasn’t really touched on in this video is for every 10 foot dash, it costs roughly $180 and that can start to really add up. An additional issue is the road needs divots cut into them so these fabric like dashes can be installed without the fear of snowplows peeling them off when it snows. It’s a matter of your state/district just putting up the money for something like that and actively inspecting the work/checking it a month/year later to track any deterioration. Most of these have guarantees from the contractors for longevity. So if your local government actually cares they’ll have engineers periodically drive through previous projects and check the pavement markings and lane reflectors. Enforcement matters and people aren’t always aware of what your government agencies do. Also, you’d be surprised how angry some people get when they see money being spent on this when so many different aspects of our infrastructure is in dire need of repair/replacement.

@@ajd6708 you make some good points. The problem I have is I feel we pay waaaay too much on taxes so the money should be there instead it’s poorly managed and wasted too many times to count

18 wheeler?

Yo 🔥kzfaq.info/get/bejne/qMp6bMWks52ucas.html

You said it perfectly!

Yes sorry about those bots!

same!!!

Same

+

Same, except with teachers

For me, it's a combination - AsapSCIENCE, Vsauce, Veritasium, MinutePhysics, etc. Just in general the educational part of KZfaq is better than any educational TV show I used to watch (and I'm even including Bill Nye the Science Guy and Magic School Bus in there) :P

@@PeterDB90 c'mon brain gamess

@@PeterDB90 kurgetsgat

Retroreflective clothing is also super important for e.g. safety vests, motorcycle/bike jackets. Closer to the usages in the video but it only mentioned clothing for about 1s :)

Saving this comment in case I ever get famous enough for paparazzis

Is it weird that I only know the Pepper’s Ghost illusion from The Magic School Bus?

Thank you for the science lesson I learned something today! Science is awesome(:

Not to be "that chick," but I still have all my reflection from when it was first in, so now that it's retro, I just dug the old reflection out of the back of my closet and BINGO, no need to scour the thrift stores for authentic retroreflection, or else settle for cheap knock-off imitation-retro reflection.

Ugh I nearly flew right past the same one for the third time this year the other day! I need to go talk to the person who lives there about their tree

when someone is about to so something dumb but you kinda wanna see what happens: (stop sign hidden by tree)

ah, or speed limit signs ftm... We have cities here (B) where police actually looks at the work planning of the city's street maintenance dept to check when they plan on trimming obstructing hedges and trees, and in the week leading up to that event they will go and have extra speed checks just behind obstructed signs. By the time people get their fine in the mail, it's already trimmed back so people can't go an take a picture to prove that it was obstructed. That's what we get from underfunding the police...

It's most likely patented and therefore while it is IP the actual design is essentially public knowledge. Some of the details of manufacturing are likely kept as trade secrets though.

Guess we're gonna have to wait for an update once the patent becomes part of the public domain...

There are two ways to do it. The usual way is to embed teeny glass beads into the plastic. They showed a large-scale version of one right next to the corner cube demonstrator. The other way is to mold "corner cube" shapes into the surface of the material when it's being produced. That's not as durable, even if a transparent protective layer is added on top, but it's effective for something that doesn't have to withstand weather.

@@unreachablesecretary Why wait?

They did say it, most basic retroreflectors are just microbeads attached to a reflective layer with adhesive. Those are probably the ones they showed in the boxes for the dry/wet tests. Since the cubic ones are more complicated, I'd assume the easiest process to be subtractive. Start with a flat layer of reflective material then etch the cube shapes with lithography (similar to microchips but with bigger 3D structures). Mix in some materials science, some physics, and some engineering and you can adjust parameters like flexibility and refractive index.

And what new shape? Lmao

Yeah

Yeah had to check the title when the video was almost over. I feel like they usually don't do clickbait but this was def click bait. They're more popular now so their audience is probably getting dumber. All hail the almighty algorithm!

This is not a simple clickbait. It’s flat out lying.

Haha good point. They're hoping the interesting science makes you forget the thumbnail no doubt 😆 Or maybe they just accidentally put the wrong thumbnail 🤔 Foreshadowing? I want that video about the shape that broke physics too! 😆

I can’t speak for how we designed more stable dyes, but I assume one way to make the red more visible at night would be to slightly reduce the density of the red dyes, allowing a bit of white light to be reflected, too. (Similar to the (undesired) effect in traditional stage light filter gels, which are never 100% effective at filtering unwanted colors, so some colors, especially blues, always looked a bit washed out when used with traditional white light sources. You had to resort to expensive dichroic filters for rich colors. Now we just use LEDs, which are natively monochromatic.)

Red is ingrained in our minds to mean “ALERT ALERT” so when we see red on the road we understand “ALERT IMPORTANT SIGN”

@@jprockafella9012 It is for us in the west. But it’s not universal across cultures: in Japan, green is the warning color, apparently.

Nah you’re making good points, it might worth seeking more info.

It's called clickbait.

Technology Connections did a more in-depth video on retroreflectors a couple of years ago. Might be worth the watch if you're interested in learning more without the PR fluff. It doesn't "break physics" per se, but it is an amazingly efficient way to make something seem like it's emitting light without using additional energy. It's seriously game-changing for road safety, among other things.

@@pawala7 breaking physics is sooooooooo far away from efficiently reflecting light, though. There’s clickbait, then there is flat out lying. The thumbnail does the latter.

The "breaking physics" aspect is referring to the law of reflection, which is that the outgoing angle of a reflected particle or wave is the same as the incoming angle mirrored on the perpendicular from the surface. On a macroscoping scale, these retroreflective surfaces don't follow that fundamental rule for the physics of reflection. He did fail to call back to the title in some way, which is disappointing for people waiting for the ah-ha moment, but the meaning of the title IS quite present in the video.

don't forget all their PFAS

.

@N www.epa.gov/pfas/pfas-explained

I know in the UK the signs used to be all caps, but were changed because it takes longer to recognise what you’re actually reading when it’s all caps, so it’s less safe!

@@EddieVanAidan that's how they "won" the lobby. Doesn't mean all the old signs needed replacing. Even a 1ST STREET would need replacing to 1St Street... so helpful!

Well, 10.3 million subscribers isn't too shabby! I think they're doing OK.

Baby they have 10 million subscribers and hundred of thousands of views each videos. What are you even saying.

@@clement9782 I know lol. I'm just suprised none of their videos end up trending on Twitter or something, cause they are quite fascinating.

Same in Belgium, thanks to 3M

YIKES DUDE I wonder if they even know about this??? Commenting so they see it. Definitely disappointing if they knew 😞 I’m so sorry to hear about your friends I wish them a speedy recovery 💕

I doubt they knew. But still, I think any time they take a sponsorship from any big corp, there's probably going to be some stories like this.

they have also saved so many lives with this tech and their mask capabilities for covid so we have to give the L to capitalism and poor govt regulation don't just blame 3M

What about other life saving innovations from 3M? It's one of the only few companies whose employees have won Nobel Prize .. But definitely I'm sympathetic to your friends condition

I was thinking about saying that.

It doesn't matter in my case, I have more sensitive blue receptors than anything else, because blue light and higher frequency will nearly blind me if my eyes aren't prepared. I even probably have vestigial UV receptors too, as I can't see UV but my eyes react to it all the same.

@@ShwappaJ UV light just looks like a blurry purple to me.

Yes I agree, a serie would be great!

Hi beautiful

lol someone else saw the same thing. Why do we have dildos there?

@@gonzalodiazexcoffon7269 😭😭 thank god I'm not the only one who thought so

They look -- and work -- pretty much like the gigantic one they showed on the table.

millions of microscopic glass beads embedded in or glued to a plastic/vinyl material.

Glass is unproblematic. It’s basically sand. (In fact, ground glass is now used to restore beach sand in some places, after extensive research by environmental scientists.) The plastics in the line paint itself would be more concerning.

I love it so much dear

Dr. Mueller was great. Always a special treat when he brought in his fiddle.

I know right? Wonder if it is their own footage. If so, bro I wish I could have met them even if they were passing by.