The World in UV

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EpicLPer : 6:00 - I always wondered how scientists flirt with each other... I guess that's a question answered now. _"Your skin looks so good in the visible spectrum of the light"_

zestyorangez : So sunscreen is blackface in ultraviolet?

Hoàng Trần Minh : do not, under any circumstances, shine uv light in a bedroom.

electronicsNmore : I have a buddy that got his 2 front teeth knocked out playing football years ago. I spotted his with a UV light by accident. Great video as usual!

Planet Noize : Dear Mr Trump, please dont deport them, its just a visual effect..

Master Therion : Will enough UV exposure cause heavy damage to the skin? Or will it only cause... light damage?

Stefan Lopuszanski : Wait you said your two front teeth are fake, but then they don't look different in the rest of the video...

DBSupersteel : 0:40 "this black towel (turns yellow) still black in uv"

Albe Van Hanoy : I ship it.

FLooper : 9:32 Half-Life 4 confirmed! ... wait ... wrong century

Starlight X : UV camera is a best way to do advertising of sunscreen )

Zhenya Farrington : Neat fanservice at 5:00.

IncognitoTorpedo : Those spots on skin that are visible in the UV are photodamage. If you were to look at, say, physics girl's butt in the UV (strictly for science...) I bet it would look fine.

Manuel Lozano : How would a rainbow look in the ultraviolet? Would there be an "ultraviolet bow" right next to violet?

Crucial Muzic : Definitely a great way to start my Sunday! <3

Physics Girl : "How do I put this..." at 6:05. Nice Derek, nice.

Jack Le : Did Derek get his 2 front teeth for Christmas?

Desert Tortoise 21 : It's not a very accurate representation of UV. Just like the Visible Spectrum, the Ultraviolet Spectrum also has its own "rainbow". UVA being the "red" side, UVB being like "green" since it's in the middle, and UVC being "blue". Thus, since UVC is completely absorbed by the Ozone Layer, UVB is _mostly,_ and UVA isn't, the "fog" seen on the UV camera should be roughly orange-ish. That camera only shows the _intensity_ of the UV, but not the Wavelength/Frequency.

toamaori : My first guess was rayleigh scattering of ultraviolet light.. feeling very clever now LOL

The God Emperor of Mankind : UV black face, I can smell the SJWs coming.

The Brony Notion : people who wear sunscreen have been getting away with blackface for years

Harmen Hoek : This. Is. Quality.

Siana Gearz : Wait, so sunscreen is UV-blackface? Isn't it kind of racist?

yash wanted yadav : One question, If ,we can see light only in visible region , uv is beyond visible,, Then my question is , how are we seeing uv , I mean , on your video,? In simply ,we cannot see anything , beyond visible, and so ,you subdivided the screen ,one say uv ,and other, visible, But they both are visible, you might be wrong,

Taylor youngreen : what about seeing in infrared?

A to Rhombus : I'd love to see a video like this for infrared as well

Rorschach : Why is that your front teeth at 1:10 aren't purple in uv like before?

Bas_ Lightyear : So when do you and Dianna Bone?

Virgílio Bernardo : Maybe that's why we don't see ultra violet light, this fog wouldn't be an advantage when you are running from a predator.

Greedie 730 : Melanin is the natural sunscreen, the higher the concentration of melanin a person produces the less they need to use sunscreen ie. Darker people such as ones who originate from places closer to the equator where the sun is more direct, really have no need for for sunscreen being that they produce their own, sunscreen is for lesser melanated people.

Vibudh Sharma : You're getting old, Derek. Now you're awesomer!!!!!! I admire and respect the heck out of you!

Matthew Krebs : Why does your skin look blue in some of the UV shots and gray in others?

eiPeiDweP : Every comment on this video: "I ship it!"

KMPZ : Is that bluetooth 4.0?

Liam Murphy : So in regards to Rayleigh Scattering, what would happen if you pointed an infrared camera straight up at the sky in the middle of the day? Would the opposite effect happen? Would we see straight into space?

Micah Philson : Aw man, why didn't you film a person with albinism under the UV camera? Their skin would have looked so different! Maybe even someone with melanism!

PBMS123 : I'd pronounce that as Ray-lee scattering, given, it's spelt, Rayleigh


Dragon Skunk : Question: Did old time silent era film had more sensitivity to UV rays? That is what UV B&W looks like, like early movies where the people appear different than their photographs.

Rotter : this is what they mean when they say that racism is covert, wypipo are literally putting black face. you need UV light to see it ..... damn you wypipo !!!

How To Make Everything : Great video and thanks for the shout out! I was wondering why our UV footage at Death Valley was so hazy in the distance, now I know why!

Amit Mathew : I wonder how trump would look like in the UV!

Space duck : I saw a look-a-like of you in a restaurant yesterday

This is so Epic : 8:05 digital blackface

Kylanacus : Hey, what about using the UV camera at night? what would the stars look like? or the moon?

N O L A N M I L N E S : 1:14 your two front teeth aren't purple or darkened anymore?

Du bist wie ein T-Rex, grosses Maul aber kein Bizeps. : Well i could tell the left one is tonic, seems like ive got the UV vision

Tony Smith : That "blue" sky is WHITE ! Thanks planes for ruining the sky and not letting me see any stars ! It is just hazzy and overcase all the time. But NORMAL, right ? No it WAS dark blue in the day and BLACK and night. Now it is LIGHT BLUE or WHITE in the day and white and night,

CoolAsFreya : So putting on sunscreen is like blackface to the sun rays 😂

BiRDiE : Derek, Did you move to America? :o