The World in UV

  • Δημοσιεύτηκε στις Πριν χρόνο

    VeritasiumVeritasium

    διάρκεια: 11:13

    UV cameras expose a hidden world and reveal the incompleteness of our perception
    The Physics Girl looks at sunscreen: grfilms.net/v-%CE%B2%CE%AF%CE%BD%CF%84%CE%B5%CE%BF-GRD-xvlhGMc.html
    How to make sunscreen from scratch: grfilms.net/v-%CE%B2%CE%AF%CE%BD%CF%84%CE%B5%CE%BF-lMXAY5F28L0.html
    In summary, ultraviolet light interacts differently with matter for a number of reasons:
    1. Some pigments selectively absorb UV so they may appear white in the visible but dark in the UV. The pigments usually dissipate the UV energy as heat, though the breaking of bonds can also occur.
    2. Fluorescent molecules absorb UV light and re-radiate that energy as visible light. This makes them look dark in the UV but glowing under black light.
    3. Ultraviolet light scatters more than visible light because the wavelength is shorter and Raleigh scattering is proportional to the reciprocal of wavelength to the power of four.
    Special thanks to HHMI BioInteractive for their awesome animations of melanocytes and how the melanin in melanosomes protect your DNA. To see the full video explaining how we get our skin color, check out: grfilms.net/v-%CE%B2%CE%AF%CE%BD%CF%84%CE%B5%CE%BF-VC0TL_lYLm8.html
    Special thanks to Patreon supporters:
    Donal Botkin, Michael Krugman, Jeff Straathof, Zach Mueller, Ron Neal, Nathan Hansen, Yildiz Kabaran, Terrance Snow, Stan Presolski
    References:
    Overview of main UV effects:
    Visualizing Rayleigh Scattering through UV Photography
    journals.ametsoc.org/doi/pdf/10.1175/BAMS-D-14-00260.1
    Arctic animals are photographed in the UV to increase visibility and get an accurate count:
    Lavigne, D. (1976). Counting Harp Seals with ultra-violet photography. Polar Record, 18(114), 269-277. doi:10.1017/S0032247400000310
    Absorption spectrum of melanin: www.cl.cam.ac.uk/~jgd1000/melanin.html
    "The spectroscopy of human melanin pigmentation," by N. Kollias. In: Melanin: Its Role in Human Photoprotection, pp. 31 - 38. Valdenmar Publishing Co. (1995).
    "Optical properties of human sclera, and their consequences for transscleral laser applications," by A. Vogel, C. Dlugos, and R. Nuffer, Lasers in Surgery and Medicine 11(4), pp. 331 - 340 (1991).
    "The incidence and time-course of latanoprost-induced iridial pigmentation as a function of eye color," by P. Wistrand, J. Stjernschantz, and K. Olsson, Survey of Ophthalmology 41(S2), pp. S129 - S138 (1997).
    Music by Epidemic Sound: www.epidemicsound.com "Spring Moods 5"

Matt H
Matt H

The opening question, because higher energy EMR suffers higher atmospheric attenuation.

Πριν 17 ώρες
wwindsunrain
wwindsunrain

Cats can see UV. How could that benefit a crepuscular hunter?

Πριν ημέρα
Aditya Thaker
Aditya Thaker

How can we see ultra violet light ? If it isn't in the visible range

Πριν ημέρα
Bhawna Khulbey
Bhawna Khulbey

0:15. That's what Indian teens look after the festival of HOLI

Πριν 3 ημέρες
Karlo Kupres
Karlo Kupres

this is NOT uv light -.-

Πριν 4 ημέρες
Adam
Adam

What does it look like in Space with a UV camera? (try it i wanna see how it works).

Πριν 4 ημέρες
MD IMRAN UL AZIZ
MD IMRAN UL AZIZ

Great dedication to make this video outstanding thanks

Πριν 6 ημέρες
美丽vick
美丽vick

MEU DEUS ALGUÉM ME DÁ UM PROTETOR SOLAR AGORA!!!

Πριν 6 ημέρες
Jack Banana Dev
Jack Banana Dev

One miyon trooopsss. Waaawww.

Πριν 6 ημέρες
Damián González
Damián González

why your teeth looks purple only at the beggining and not the rest of the video?

Πριν 10 ημέρες
Tactical Wolf3
Tactical Wolf3

Well we wont know for certain how the world looks like in UV because the camera needs to show it in the visible side of the spectrum so we can see the differences that we cant see

Πριν 11 ημέρες
Narration Studios
Narration Studios

Did anyone else hear that low htz noise at 9:35 seconds?

Πριν 14 ημέρες
priyanshu sherke
priyanshu sherke

Your every video is amazing i love your ❤️❤️❤️❤️ video

Πριν 15 ημέρες
Blake Windson
Blake Windson

Hi I'm the one who subscribes your youtube channel. I had had a question so I did search about it on my own, but I couldn't solve it. Could you answer my question? The question is this. If I shoot the same intensity of infrared light and visible light to an ordinary black object (such as black T-shirts) which case the temperature would be higher? I previously expected that the infrared light would let the temperature higher because its energy goes more to molecular vibration than electron excitation. While the energy of visible light goes more to electron excitation than molecular vibration. Is this explanation correct..?

Πριν 16 ημέρες
Charles Clements
Charles Clements

Thank your answering my question. I did not ask you but I asked every one else and no one would give me an answer. The teachers told me a lie. They said that insects see more towards the infer red light. So, I was asking them why are bug lights that are built to attract bugs using ultra violet lights. Of course the answer that I got back was, "I don't know." Thank you for telling the truth.

Πριν 16 ημέρες
DukeOfEarle88
DukeOfEarle88

"Virtually nothing absorbs in the UV..." Oxygen/O3: 😑👍

Πριν 17 ημέρες
Four4
Four4

IRL fog of war

Πριν 19 ημέρες
vasundhara raj
vasundhara raj

why is nobody talking about the cuteness of harp seal pups? i died.

Πριν 19 ημέρες
Meras Nzambemana
Meras Nzambemana

The best way of coming out about your teeth is this way if not similar

Πριν 26 ημέρες
ANURAG AMCHI
ANURAG AMCHI

infrared please

Πριν 29 ημέρες
Robert Hall
Robert Hall

You should have done this with a comparison with Near Infrared.

Πριν 29 ημέρες
Mangplamatada Von yiurs
Mangplamatada Von yiurs

But we still cant see uv light were looking at this video in visable light because thats how our eyes see the worl so well never really know what uv really looks like

Πριν μήνα
KittyFlowers95
KittyFlowers95

So sunscreen is uv blackface #triggered

Πριν μήνα
M_Faraday
M_Faraday

The laugh at 2:31 really cracked me up

Πριν μήνα
David Harper
David Harper

Yall gotta basically paint yourselves black to not fall victim to the sun...🤦🏾‍♂️

Πριν μήνα
Carbon Crowns
Carbon Crowns

And then many have the nerve to show distaste toward people for being that color...smh. Weirdos.

Πριν μήνα
Allen Attoni
Allen Attoni

OMG I WANT TO GO TO A BUSY BEACH DURING SUMMER AND RECORD THE BLACK BLOTCHES ALL OVER PEOPLE ! HAHA

Πριν μήνα
EASY ELECTRONICS by Ajay lakhara
EASY ELECTRONICS by Ajay lakhara

awsm

Πριν μήνα
Jacandra Haser
Jacandra Haser

Diana: So tan Me: I wish I was whiter

Πριν μήνα
fat Kraken
fat Kraken

6:07 flirting through the nth dimension lol

Πριν μήνα
Adrian Kraska
Adrian Kraska

And then time for infrared

Πριν μήνα
DroidLocks6971
DroidLocks6971

God made sunflowers that way

Πριν μήνα
chris the pusher
chris the pusher

#blackpower💜✊🏿

Πριν μήνα
NWO
NWO

how would people with a higher concentration of melanin look under uv or when applying sunscreen?🤔

Πριν μήνα
JuXuS1
JuXuS1

2:31

Πριν μήνα
Rithvik B
Rithvik B

of course you know more than the physics girl

Πριν μήνα
BiggBoi
BiggBoi

Sunscreen is racist because it looks darker in UV and if you wear sunscreen you're racist because your actually wearing darkface.

Πριν μήνα
MrResns
MrResns

lol, i was so hyped to order bunch of uv lights and uv artworks to put up in my room, and i just had my front teeth implant done yesterday. that will be fun xD

Πριν μήνα
Mohommed Soumaoro
Mohommed Soumaoro

Black people?

Πριν μήνα
steven burnham
steven burnham

I was about to make a blackface joke. Been done!

Πριν μήνα
parkzone10
parkzone10

So every time someone put on sunscreen they’re doing blackface

Πριν μήνα

Επόμενο

How to Slow Aging (and even reverse it)

21:10

How to Slow Aging (and even reverse it)

Veritasium

προβολές 661

My Life Story

11:41

My Life Story

Veritasium

προβολές 1

How to Understand the Black Hole Image

9:19

How to Understand the Black Hole Image

Veritasium

προβολές 5

NLE Choppa - Side (Official Music Video)

2:43

NLE Choppa - Side (Official Music Video)

NLE CHOPPA

προβολές 2 853 025

YoungBoy Never Broke Again - Dirty lyanna (Official Video)

3:49

YoungBoy Never Broke Again - Dirty lyanna (Official Video)

YoungBoy Never Broke Again

προβολές 7 799 004

Why Are 96,000,000 Black Balls on This Reservoir?

12:07

World's Lightest Solid!

12:02

World's Lightest Solid!

Veritasium

προβολές 18

Can You Solve This Shadow Illusion?

3:32

Can You Solve This Shadow Illusion?

Veritasium

προβολές 1

Engineering with Origami

18:22

Engineering with Origami

Veritasium

προβολές 2

Can You Solve This?

4:44

Can You Solve This?

Veritasium

προβολές 11

Misconceptions About the Universe

5:46

Misconceptions About the Universe

Veritasium

προβολές 5

I Waterproofed Myself With Aerogel!

12:22

I Waterproofed Myself With Aerogel!

Veritasium

προβολές 13

How Cod Saved the Vikings

9:12

How Cod Saved the Vikings

Veritasium

προβολές 1

Can You Swim in Shade Balls?

10:42

Can You Swim in Shade Balls?

Veritasium

προβολές 13

How Does a Transistor Work?

6:00

How Does a Transistor Work?

Veritasium

προβολές 2

Is This What Quantum Mechanics Looks Like?

7:41

Is This What Quantum Mechanics Looks Like?

Veritasium

προβολές 3

Why Women Are Stripey

5:17

Why Women Are Stripey

Veritasium

προβολές 5

Why Machines That Bend Are Better

12:52

Why Machines That Bend Are Better

Veritasium

προβολές 4

The Illusion of Truth

8:25

The Illusion of Truth

Veritasium

προβολές 2

Is Glass a Liquid?

7:02

Is Glass a Liquid?

Veritasium

προβολές 4

The Science Behind the Butterfly Effect

12:51

The Science Behind the Butterfly Effect

Veritasium

προβολές 1

Γιώργος Γεωργίου | Betarades Guest (QNA)

1:7:07

Hell's Kitchen Albania - Sezoni 2, Episodi 9, 13 Dhjetor 2019 - Reality Show

1:54:12

VLOGMAS Day #13 (Κρατάω μυστικά) * Evelina Nikoliza

15:15

Billie Eilish - xanny

4:26

Billie Eilish - xanny

BillieEilishVEVO

προβολές 28 640 297