For the hummer it’s 0-60 mph in 3 seconds, not 60 😂

@jimmygreenspan8832

Жыл бұрын

Lol what is it, a freight train? Might be impressive then.

@colorado841

Жыл бұрын

Must have been made out of lead....takes 60 seconds to start and 60 seconds to stop.

@michaelheal3600

Жыл бұрын

Stealthy 🥷

@itoibo4208

Жыл бұрын

try this with a tshirt and you will find your skin burning in a black one.

@colorado841

Жыл бұрын

@@itoibo4208 Yes, In order to cool off you have to transfer heat that is made in the body to the environment. If most of the heat is coming from one direction you want to block the transfer by wearing something reflective like white or silver. In the other direction though black wins as it can absorb and radiate more energy.

*"It depends... on literally everything."* words to live by

@mastershooter64

Жыл бұрын

answer to 99.99% of all questions: "it depends..."

@ShlokParab

Жыл бұрын

Only quantum mechanics is exception... ...where the answer to every question is "It's uncertain".

@niks660097

Жыл бұрын

@@ShlokParab more accurately uncertain until measured..

@Blackmark52

Жыл бұрын

@@niks660097 "until measured.." More accurately until after the uncertain part of the information is kicked out and lost forever.

@dariuslegacy3406

Жыл бұрын

@@niks660097 no, no... Even when you measure. Ask Heisenberg. Not the meth dealer, the scientist.

I have worked outside in the heat (90-105) a lot from jobs before. The biggest difference in being hot or cool is the material. It's far cooler to wear light breathable material with long sleeves to keep the sun off but allow sweat to evaporate. I started wearing t shirts but learned that things like light hooded joggers made me feel coolest. The color didn't matter.

@ChrisG1392

Жыл бұрын

Must have been low humidity. In high humidity white clothing is always cooler.

@seanurquhart3179

Жыл бұрын

@@ChrisG1392 true it was a very dry environment most of the time. Never worked much in high humidity.

@pest174

Жыл бұрын

Thank you! Been having this argument with my wife for years.

@westonding8953

Жыл бұрын

@@ChrisG1392 does water vapor affect convection?

@seanurquhart3179

Жыл бұрын

@@westonding8953 I think it would have more to do with sweat evaporating. In a humid climate that would matter much less since the air is already very saturated so the fabric matters less. In dry air, that compensates for any color difference by a lot, but in a wet environment the color probably wins out. My guess.

You also have to consider, in general, the _non-linear spectral response_ of different materials and coloring agents. Some materials which are black in visible light are white in infrared, and vice-versa. That can have an extremely profound effect upon the observed affect.

@arvana

Жыл бұрын

So to stay cool in hot sun you'd want a material that's white in the visible spectrum and black in infrared? Is there such a material?

@Zaros262

Жыл бұрын

@@arvana Infrared is the only one that really matters for this discussion. I think their point is that you may be surprised to find that some material you thought was white (because it reflects the visible spectrum) actually absorbs infrared

@ericwazhung

Жыл бұрын

@@Zaros262 Wouldn't things like this effect the measurements taken by an IR thermometer diferently than other types of thermometers?

@Zaros262

Жыл бұрын

@@ericwazhung AFAIK, yes you are supposed to calibrate IR cameras for the emissivity of the object you're measuring. I would expect if you got the three bottles to be the same temperature, the black bottle would be (incorrectly) reported as a hotter temperature than the others

@OnTheRiver66

Жыл бұрын

Some white objects, especially white paints and plastics, can have high emissivity (high absorptivity) despite their color. Look for tables showing emissivity of different substances - the higher the emissivity the more absorptive.

Fun fact: navy/dark blue is the best color to wear in the sun because it has the best balance of UV-absorbing qualities while not warming up as much as black. Maybe the UV aspect is one reason the Bedouins like to wear black because it helps protect them from sunburns better than wearing white!

@pigeonlove

Жыл бұрын

Re Bedouins black is cheaper than blue

@YochevedDesigns

Жыл бұрын

This makes sense. I live in Israel, and navy blue is by far the most popular color among Orthodox Jewish women. The poor guys are stuck wearing heavy black coats.

@varsityathlete9927

Жыл бұрын

@@pigeonlove often the black is a blue. its just very dark indigo. you see this on rugs too, what looks like a black is just very dark blue, and with age it softens in tone. another way to know is moths, they love indigo dye, madder too, they won't touch chrome black chemical dye, so if you see an old yurt, the moth damage is only on some colors. rugs too.

@Burnamanism

Жыл бұрын

Yeah, I figure it’s a UV thing…I like to imagine that as the light passes through the weave of the fabric, some of it bounces around on the fibers, with dark threads dampening the reflections through absorption.

@DBT1007

Жыл бұрын

It also about... The night it can be SO COLD. So.. The black color helps them to stay warmer in the night

The black clothes are seriously the weirdest and coolest thing I've ever seen. I kinda want to make my own and go walking town, day and night. It's like the deepest, darkest shadow ever walking around.

I'll probably be proven wrong later, but TheActionLab is one of the KZreadrs still with a sense of honor. I respect him for putting sponsors at the very end. an advertisement is more efficient when the viewer doesn't feel punished.

@dinospumoni5611

Жыл бұрын

I appreciate it but there's nothing wrong with people who use midroll sponsorships, you can just fast forward past them and some sponsors probably require it or pay more for it.

@Grizzlox

Жыл бұрын

I use the ad time at the end to browse comments

@shycracker

Жыл бұрын

@@Grizzlox honestly everyone should do this as well when watching ads section

@_BangDroid_

Жыл бұрын

There are heaps. KZread is freaking enormous. Perhaps broadening your horizons may help you find others.

@intensecutn

Жыл бұрын

NileRed has a good sense of humour. I think there are plenty more too.

my experience (mostly outside deserts) is quite different when wearing single layer blacks feels significantly warmer, sometimes even feels hot like sunbathing even if it's cold outside when there's no wind

"The answer is that it depends, on literally everything" My favorite answer.

@justayoutuber1906

Жыл бұрын

Don't answer "Are you a pedophile?"

"0-60 mph in 60 seconds" typical hummer

In the Jurassic Park novel one character asks Ian Malcolm why he would wear black clothes to a tropical island, and he answers back questioning whether they understand black body radiation. I always enjoy those little scientific asides in Crichton's books.

@kg4boj

Жыл бұрын

Only he's pretty wrong about the tropical weather. if you wear black in high humidity high sunlight you will suffocate

@r4v3nboy

Жыл бұрын

I wish they ever made a movie based on hes book. Not some i like this i like this and lets change this.

@kg4boj

Жыл бұрын

@@r4v3nboy The book was pretty boring.

Excellent video. Heat transfer can be rather complex and you show this perfectly.

Thank you for making this video. I always had questions about the black and white temperature difference.

I've been wondering about this for awhile now! Thanks for clearing it up!

2:33 I love how casually you say "it's about 45 degrees" 🤣 I was thinking in Celsius and my reaction was "wow he's taking that rather well. He's in his element, unperturbed"

Do your neighbors ever wonder what you're up to?

@davidhoward4715

Жыл бұрын

"What the heck was that???" "Calm down. It's just Jimbo doing one of his experiments."

wouldn't it make sense in cold places to still have it black outside, but white inside, and in hot placed the other way around? I even heard of white paint used to buildings to reflect the sunlight

as the winter is about to start this video was helpful thankyou

Thanks I learned something today! Keep it up!

Interesting. I lived in the tropics for several years and dark was always terrible to wear. My wardrobe became all light colours. So from my experience I would say if the fabric is the same, then a lighter colour is definitely cooler when in the sun.

@SRG-Learn

Жыл бұрын

"It depends... on literally everything." Are you exposed at short periods? Do you pass by reflective materials like sand or water? Have you measured it or is a feeling? Does lighter clothes make your eyes color pop and bring that extra zing?

@DreadShotYT

Жыл бұрын

No no no no no jb uk ik hm jb bm kbhi ni ho rha hai to the next two weeks ago and the other days I want to the other day And it was and want to be very special to be a great👏👍just don't don't have to go on a Saturday night🌃 want a goodbye👋👋👋👋👋👋 to be very much as possible to the new one is🇧🇷🇧🇷 for me and you can get some of I don't knowing that Indian🇮🇳 Army and I'm so I can some reason I don't have to the next day And I'm still waiting for my birthday🎂 is a great👍👍👍 day And it will be very very very very good day And night and it will make you🤣🌹 feel bad👎 for me to the new friends with my new favorite😍😍 color🎨 is🇧🇷🇧🇷 a new car🚘 and I don't have time

@DreadShotYT

Жыл бұрын

Hahaa that was cool

@alexven92

Жыл бұрын

That study was done in a bone dry desert environment so I think air humidity can change things a lot

@pigeonlove

Жыл бұрын

It's probably also psychological in hot humid places as lighter colours are perceived as cleaner/more hygienic

I have experienced a major difference in temperature when wearing different color latex gloves. Maybe it's because Latex gloves are in direct contact with my skin, that I feel the black gloves instantly heat my hand when in the sun light opposed to white gloves. Maybe that's why the difference between black and white loose clothing doesn't matter too much. Have someone put a black and white glove on your hands while not looking and walk out into the sun. Because of the skin tight contact, you'll guess which hand has the black glove.

I don't know what to comment this early but your videos are really good and educative. You really explain things easily and make video entertaining ♥️

He's walking around like he hasn't been unlocked yet.

Could the black material act like a heat-sink, by wicking away heat from the body in the parts that are in the shade? If the fabric emits heat from the surface of areas in the shade, won't it then conduct heat from the skin below? I think that the pervasive winds where they live might have something to do with it too...

I bet it depends on material, too. I have black cotton polos that feel fine. But the nilon polo gets so hot in the sunlight, I can't wear it in the sun at all.

@MrEazyE357

Жыл бұрын

Nilon?

Zero to 60 miles an hour in 60 seconds? That sounds really good.

@BlakeAnghilante

Жыл бұрын

Meh, only around a factor of 20 off...

@Rexolaboy

Жыл бұрын

Sign me up lol

@sephypantsu

Жыл бұрын

I can run faster than this car for 5 seconds or so lolz

@jonathanbetenbender307

Жыл бұрын

Finally something I can race in a Geo Metro (other than another Metro).

@BarthiArgento

Жыл бұрын

😂😂😂 i thought the same

I've always wondered about this, but (apparently) been too lazy to research. Thanks for giving us a quick and dirty breakdown!

Thanks for this answer!!! I’ve been getting mixed stories on this topic since I was little.

All teenagers already knew black was cooler

@KellyBelly24

8 күн бұрын

😂😊

@KellyBelly24

8 күн бұрын

Get it

ok I have a question based roughly on this topic... Is this the same in a sealed car. assuming the same internal car color and shape and everything as close as possible. dose the internals of a black or white car get and stay hotter longer, or in winter what car will get colder quicker.

That black outfit would make a great Halloween costume: "Invisible Pedestrian"

@davidhoward4715

Жыл бұрын

This will not end well.

This video was life changing

I'd be interested to see how the blackest black clothing would look through military grade nvgs at night. If it reflects no light it theoreticly should be invisible to pvs 7, or pvs 14 which were the best night vision devices they had when I was in

@insertphrasehere15

Жыл бұрын

well, actually it could be TOO black, showing up as a shadow against the background.

@michaelabraham9177

Жыл бұрын

@@insertphrasehere15 it'd be very interesting to see. Also extremely fun to play with in various backgrounds. Makes me wonder about thermals too.

@dire284

Жыл бұрын

damn that's actually a really good idea.

@sikliztailbunch

Жыл бұрын

It will still give off fresnel reflection. The edge sheen, you can also see in the video. It´s caused by the surface structure. So in case, the person is even slightly lit from the back, the nightvision will pick that light up.

@michaelabraham9177

Жыл бұрын

@@sikliztailbunch so basicly stay low to the ground, or close to objects larger than you. That'd be very interesting to play with.

I wonder what the effects would be if clothing was reversible and white on one side, black on the other. Are there advantages to warming up or cooling off depending on which side is facing out?

@ValkyRiver

Жыл бұрын

Light and shadow?

@AirsoftAlmighty

Жыл бұрын

.

@hyperx72

Жыл бұрын

Call it "Day n night"

@malinatof

Жыл бұрын

thats literally how the colours on penguins work lol

@goodgenes0

Жыл бұрын

@@malinatof but it's not lol

Yo your videos have increased quality man

That ninja trick tho! Magnificent :)

Working evening and overnight shifts for most of my life, it was impossible to not notice that darker cars got frost on them before lighter cars, and of course, the frost melted on dark cars first in the morning. I’ve heard that painting exhaust headers on race cars white lowered the temperature under the hood by as much as 100 big-ass FAHRENHEIT degrees. I would assume this would also raise the temp at the exhaust tail pipe considerably. It’s been said that painting the fins black on air-cooled engines aids cooling, and it probably does, but not much, judging by the number of unpainted fins out there. An idea - Black Ice Cube Trays! Scientifically Proven to freeze water faster! (Not as effective with freezers that work by convection - which is most of them.)

Imagine playing hide n seek in that

@ShlokParab

Жыл бұрын

Especially in night your can literally stand in open and be invisible

@davidhoward4715

Жыл бұрын

@@ShlokParab Actually, it's *_too_* black. You would stand out against the background as a black blob.

05:45, can go 0-60 in 60 seconds… I think those figures need an Action Labs investigation 😂

So far, this is the most interesting thing I’ve actually learned from this KZread channel.

If you are only wearing a Tshirt and there is little to no air movement the difference on a sunny day can be rather extreme. I have some shirts that when inside or when not on a very sunny day are feel virtually the same (well they are the same shirts just in different colors after all), but in autumn when sitting outside with a low but strong sun the white ones are too cold, while the black ones make me sweat.

@geemy9675

Жыл бұрын

same experience here. also it. could be different when air temperature is way past body temperature. for instance driving with windows open and no AC feels worse than no AC and windows closed...also riding a motorcycle faster will feel even hotter and motorcycle gear will insulate you from the heat. I think it's the same in the desert you need to be insulated by loose clothes and layer of air, probably in this case color doesn't matter as much

@Blox117

Жыл бұрын

only wearing a tshirt is called public indecency

@geemy9675

Жыл бұрын

@@Blox117 not if it's long enough.

@ABaumstumpf

Жыл бұрын

@@Blox117 nah - i should charge for that :)

Oops, I think you missed the 0-60 mph on the Hummer. Generally they would go 0-60 in 5 or less seconds not 60 seconds.

@Nick-Matchem

Жыл бұрын

I bet he did that on purpose, maybe to see if anybody would catch it....The Hummer has over 1000 HP and does 0-60 in 3.3 Seconds !!

@KimballPrecisionRifles

Жыл бұрын

@@Nick-Matchem he was probably reading a script for his sponsor, I’d bet the sponsor doesn’t have a clue what they’re talking about.

@MrCh0o

Жыл бұрын

@@KimballPrecisionRifles I feel like he would've caught it if it was in the script, sounds like he just did it in a single take and brainfarted

@3:17 Haha, that is the exact same question I asked when I was little (well "those people in the desert") when my mom told me I shouldn't wear black out in the sun. But I also learned since that their clothing is just much better suited than ours.

Interesting video, thanks for posting.

A question: wouldn’t the emissivity of the differently colored bottles affect the reading of the infrared thermometer?

@_BangDroid_

Жыл бұрын

Thermal cameras are bad with reflective objects too

Ive used a thermometer gun like that on my dogs and the black fur was significantly warmer. Like about 20 degree difference compared to brown and about 25 degrees hotter than their white fur.

@Draconiangem

Жыл бұрын

Your measuring the fur though, not the temperature of their skin underneath. Hair behaves a bit differently as it both absorbs and insulates at the same time.

@GraveUypo

Жыл бұрын

@@Draconiangem like i said, we can't just carelessly keep black cows in the field if there's no shade for them to hide here in brazil because they die of heatstroke, while the white ones are fine. the dog is hotter underneat the fur, too.

@bhami

Жыл бұрын

Right; I've noticed this on my black and white dog. Given all the factors described in this video, to me it's still an open question as to what if any difference it makes to the dog underneath. Obvious sweating is not available to the dog's fur.

@srboromir452

Жыл бұрын

Just remember that black is gives off more infrared as white at the same temp, so an infrared thermometer will read the black as being hotter. That's why they're inaccurate at reading skin temperature and you need a specially calibrated one for foreheads.

*now I know what what I’m wearing on my next hit…tha action lab* 👍🏾

Neat Steve. A windproof black jacket will warm faster in the Sun. The wind won't cool you as fast. I like to hike in winter and if there is Sun, I wear black water/windproof jackets so the Sun warms me up and my warmth holding sweater under the outer jacket, dark clothing is good in winter!

1 How about black and white cars? In sunlight, the black car is much hotter than the white. 2 Does the black item lose heat faster just because it starts at a higher temperature?

@FreeRiderNeal

Жыл бұрын

That's a very interesting question there. I had 2 identical cars, one graphite gray and my current one is pitch black, and I will be honest with you. The black car does feel hotter when I get in it in the summer, but when I'm driving I noticed the AC inside the car gets way colder quicker than the gray car did. Again identical makes models and years.

Dark clothing color doesn't mean hot when exposed long enough to sunlight to feel you're getting hot it may depends on what kind of material they use to make that clothing or probably it's the wearer who sweat a lot than average.

This video is amazing.

That ninja thing at the end got me. It was impossible to see him beforehand.

I think that the cold piece of metal, the wind and the temperature of the air are irrelevant in this experience. The cold piece of metal will only absorb the energy by conduction if its colder than the bottles. It do not affect the radiation rate without contact. It is just emitting less light and lower frequency light toward the bottles than hot metal. I think that we could even say that the cold metal is heating the bottles because it is emitting radiation energy toward the bottles. Its just that the bottles emitting radiation rate is greater than the receiving rate at this moment. A breeze will cool you down the same whatever you have a white or a black cloth because its a conduction heat transfert effect and colors have no effects on this. My question now is : what is the most relevant factor for heating a black object, the wavelength or the number of photons received ?

Great video! Would the black be cooler if you are sweating because it would evaporate faster? What would the sensible temperature of the bottles be checked with a thermocouple or other type of thermometer? Do you get the same reading on the white bottle with the infrared thermometer if you put a piece of black tape on it and check the tape? What about white tape on the black bottle?

Awesome video! I always tell people that it doesn’t matter if I wear black clothes or not, depending on different factors of course. In future I will just show them your video 😄

My gothic ass needs to get her hands on a bolt of that fabric.

Doesn't using an IR thermometer to measure surafaces with different emissivities (which affect the readings) somehow defeat the purpuse? :) I think using contact thermometers would be a better option here.

The different emissivity of the surfaces also distorts your thermal camera reading. Even if all the bottles had the same temperature, the black one would appear hotter on the thermal camera. (Assuming that there are no anomalies in the infrared spectrum, which probably is the case)

@kennethferland5579

Жыл бұрын

No the camera thing is measuring the wavelength of infared light being emmited which directly correlates to temperature, not the quantity of light which would be determined by the emissivity of the material.

@james-blond

Жыл бұрын

@@kennethferland5579 Do you have a source for that? I work professionally with optical metrology, and I have never seen this. Ordinary thermal cameras just measure the optical power over a broad wavelength range. (Thus integrated over the entire black-body spectrum.) Because the radiation increase by the power of four proportional to the temperature, this works quite well if the emissivities of the materials are comparable. I quote from Wikipedia: "Images from infrared cameras tend to be monochrome because the cameras generally use an image sensor that does not distinguish different wavelengths of infrared radiation."

@neohermitist

Жыл бұрын

It seems the best test is to paint three metal plates on one side, one white, one gray, one black and measure the temperature of each sheet on the bare metal side.

Awesome video again! Could you please put Celsius and Metric systems as well in your videos?

Well I learnt something new today

I dont think that clothing is actually very dark. Pretty easy to see the texture compared to some of your other black projects

@westonding8953

Жыл бұрын

@@tripplefives1402 yeah. That got me thinking.

@addisonknox5052

Жыл бұрын

"They absorb almost all light in the visible and infrared spectrum." What more do you want from me.MP4

@prumchhangsreng979

Жыл бұрын

@@RETYQ it’s just a normal comment. U act like NK leader, throwing tantrum over an ant

@ChrisG1392

Жыл бұрын

@@tripplefives1402 that makes sense i bet thats true and the other tests he did might have been artificial lighting

@nameredacted1242

Жыл бұрын

And that is just visible spectrum!!!

0:40 yo dis nigg@h sayin we have super pwers n shit

@BonezyBoy

Жыл бұрын

😂

The robed figures on the sand dunes was an evocative image

Perfect test for a good desert phone case

Has any one who lives on the east coast USA ever noticed its harder to find clothes to keep you warm in the winter than it is to find clothes that keep you cool in the summer?

I’d say you’d get chased by many because of how hot your clothes are, so be careful.

@davidhoward4715

Жыл бұрын

Happened to me so often...

Damn nice vanta black jumpsuit dude

4:56 thank you for this 😂

Poor shadows. 💀 If these clothes are so hot, what about our shadows? How much warmth do they bear to be with us?

@davidhoward4715

Жыл бұрын

"The Shadow knows!"

But you would have to be in the shade for the emitting to take full effect. Therefore the black clothing would be hotter in direct sunlight.

Learned It ⚒️

Neat. I say go for it, be a ninja. Maybe in the next video we'll see some ninja star experiments.

4:57 That really looks like an edit because of the smooth, textureless black...

The darkest robe was reflecting a surprising amount of light out in the open :P

Very interesting, thnx

Well this scientifically confirms what i have thought my whole life. Yet most ppl always thought i was the one that was wrong 🤣

Admit it, you inherently want to say "degrees celsius" but something's stopping you. 😂 Great Video.

Science Ninja gotta Science Ninja.

You are a mesmerizing teacher. 🥰

Heat transfer is my favorite topic along with thermodynamics

"You haven't unlocked this character yet "

2:56 why not wear that for Halloween and scare some kids sh*tless 😂

4:00 This is why when people say "I'm getting hotter then you because I have a black shirt" I just laugh inside

Very surprising indeed 😊

"this makes feel a lot cooler" my guy got his fax straight😎😎

I like your funny words science man

Well it depends if the heat can transfer from the clothing and onto the skin. I have definitely worn dark clothing and swapped to lighter clothing in the summer to stay cooler. I've had to swap many dark t shirts out because it's too warm. I've also noticed it with shoes when swapping from black leather to white leather shoes.

How do those cold weather coats and jackets, with the round metal looking dots, operate?

Fantastic. This was covered in/on QI a long time ago also.

He looked like a character I’ve yet to unlock

Cool channel man

I can hear your neighbor say, "honey that science nut is outside in black cloths." Anyway love your videos!

Now that's some news

i like the ninja thing like a shadow..... good idea wearing this during night while strolling as a ninja

2:48 guy just turned into a shadow lol

This guy along with mark robber and kurzgesagt are the only ones that somehow explain stuff that's complicated into something simple to understand

White reflective jacket with aerogel inner lining = great winter clothing drip.

Thank you IA

Slowly he went to space and educate us😂

That suite is super cool for Halloween imo

@justayoutuber1906

Жыл бұрын

Invisible Pedestrian

@davidhoward4715

Жыл бұрын

@@justayoutuber1906 _Bump!_ "Oh no!!!"