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"_

R.C. Whitehead : Use sunscreen, be labeled a racist.

zestyorangez : So sunscreen is blackface in ultraviolet?

Albe Van Hanoy : I ship it.

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?

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

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

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!

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

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

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.

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.

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

Zhenya Farrington : Neat fanservice at 5:00.

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

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

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

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

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

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

Harmen Hoek : This. Is. Quality.

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,

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

haxhxm : Can I use UV to find out fake friends?

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

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

N R : this is how women see men. Which is why none of us can get laid.

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?

R V : You look older in uv light

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

aWeirdAccount Bruuuh : Every comment on this video: "I ship it!"

Taylor youngreen : what about seeing in infrared?

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.

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,

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!

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

马桶王子 : 4:58 ooh u sexy beast

englaaa ' : 0:00 i'TS BLUE

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

Bas_ Lightyear : So when do you and Dianna Bone?

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.

Blue Shadow : I thought they absorb more UV light to increase their temperatur as white fur is bad at absorbing visible light. Bonus fact: polar bears have hollow hair and dark skin for that very reason.

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

Van Hendrix : Hmmm... Vampires can't go out in the day due to UV light

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

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 !!!

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

SoldierOfFortune : THANOSTEETH THANOSTEETH THANOSTEETH

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