SUNSCREEN in UV

100 thoughts on “SUNSCREEN in UV

  • June 28, 2019 at 2:46 am
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    many insects see uv (also shrimp for some reason), and flowers have special patterns that show up in uv to direct pollinators to their nectar. butterflies raised in cages can find artificial nectar if it's in conjunction with some kind of uv reflecting item, like plastic beads. The moral here is if you collect butterflies and don't want to be seen, 🙂 some sunscreen might help.

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  • June 28, 2019 at 6:23 am
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    Was skin cancer the most common cancer in the US before we all started using it?

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  • June 28, 2019 at 8:10 pm
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    Love is NOT chemical

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  • June 29, 2019 at 3:24 am
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    So…I've heard of these swimsuits that are made of some kind of special fabric that allows UV rays to pass through it. The purpose of these swimsuits is to allow someone to tan their entire body while still remaining clothed, and not having to worry about tan lines. I'm curious to know if, when viewed through a UV camera, these bathing suits are… I don't know…see through? Invisible on camera? I wonder what would happen.

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  • June 29, 2019 at 1:46 pm
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    Gold is not a chemical?

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  • June 29, 2019 at 6:36 pm
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    Most sunscreens have parabens so you know choose what you want skin cancer or breast cancer

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  • June 29, 2019 at 9:51 pm
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    What about a like traditional vs. spray sunscreen discussion

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  • June 30, 2019 at 12:17 am
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    I am very curious to see UV/non UV sunglasses in UV!

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  • July 1, 2019 at 7:43 pm
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    I realize just now that every summer, without anyone knowing it, im secretly doing blackface … 😲

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  • July 2, 2019 at 1:12 am
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    This was good but that girl acts so damn cringey it was hard to watch

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  • July 2, 2019 at 12:03 pm
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    You are not kids.. 10:42

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  • July 3, 2019 at 4:38 pm
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    I'd like to make a "special video" with physics girl! :o)

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  • July 3, 2019 at 5:21 pm
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    Now do a video about how long suscreen actually lasts.

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  • July 3, 2019 at 9:25 pm
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    Make one on microwave radiation, how it looks.

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  • July 4, 2019 at 12:24 am
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    your hair looks really soft and smooth. if you use anything to cause that. what is/are they?

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  • July 4, 2019 at 6:44 am
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    My family doesnt get anything under 50

    100+ if we can

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  • July 5, 2019 at 12:09 am
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    u should test makeup with spf

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  • July 5, 2019 at 5:28 pm
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    I need some vitamin D

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  • July 8, 2019 at 1:46 am
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    Are you guys related 9veritasum and physics girl) other than the love of science ? 🙂

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  • July 9, 2019 at 11:37 am
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    I have lupus and this is supremely relevant. Thank you! 💜

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  • July 10, 2019 at 5:07 pm
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    I read or heard that the problem with above 50+ sunscreen, the issue is not that they dont actually block out more UV light, the issue is that regardless of the UV protection factor, your skins oils start to slough off the sunscreen. The issue there is that someone with 100 SPF believes that they have to apply less often than 50 SPF, and that is false because how fast your skin removes the sunscreen, or it gets washed off or rubbed off of evaporates etc, has nothing to do with the SPF factor.

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  • July 11, 2019 at 2:08 am
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    Sounds kinda counter-intuitive that you want to absorb the UV, instead of repel it, when you think about it. Shouldn't we really use something that reflects all the UV light instead of absorbing it? 🤔
    EDIT: Hadn't gotten to 5:54 yet. Nice.

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  • July 12, 2019 at 9:08 am
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    Fpa is actualy number that represents extra minutes you can spent in sun

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  • July 13, 2019 at 2:10 am
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    White people unknowingly painting themselves BLACK. LOL

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  • July 13, 2019 at 3:35 pm
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    Why not show how all the Cancer producing properties enter the blood stream? If you can't put it in your mouth, don't put it in your mouth.

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  • July 13, 2019 at 3:54 pm
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    Should have talked to a dermatologist

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  • July 13, 2019 at 7:20 pm
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    I just recently discovered this channel and this video and and found it awesomely informative. I learned so much from it and I like how the information is broken down so that it's accessible to an average person on the street.

    But… I was also completely distracted by the fact that Dianna and Derek were sitting on the couch with their footwear on. Yes, I realize it's an outdoor piece of furniture and exposed to more dirty elements than a comparable piece of indoor furniture, but even so, seeing "shoes" on the furniture bugged the living daylights out of me. It's a personal picky that is equal parts the buttons my parents installed in me growing up, and the fact that I live in a big city and walking through town, the streets and sidewalks are extra nasty and had visions of that gunk being transferred to the sitting area. I"m sure I'm not the only one. lol So anyways, I had to watch the video a couple of times to get past that and fully get full details of the message <shrugs>
    Love the science and the learning, but please, keep the shoes off the furniture. even outside! 🙂

    That little rant aside, I hope to see more from the channel that spark my desire to learn more!

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  • July 14, 2019 at 1:31 am
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    Is it true that the effect of the sunscreen wears off after a couple of hours? Did you verify that ?

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  • July 14, 2019 at 10:23 am
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    Thumbnail – Diana : battle Angel

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  • July 15, 2019 at 7:22 am
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    Doing black face. Wow I am really offended

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  • July 15, 2019 at 1:50 pm
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    Most sunscreens I tested give me headache and burning eyes. And no, I do smear or sweat it into my eyes.

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  • July 16, 2019 at 1:29 am
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    Imagine putting on all those different sunscreens from weakest to strongest (In SPFs) on your arm and sorta blending them and making a gradient tanline that would be so cool

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  • July 16, 2019 at 3:23 am
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    She looks Dutch.

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  • July 16, 2019 at 7:45 pm
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    The only use for the UV camera was to spray sunscreen graffiti and look at sunscreen on the skin? Very disappointing. What about putting it on a something transparent to UV and using the camera to see how much was UV was allowed through the sunscreen? I think the camera could have been better used.

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  • July 16, 2019 at 10:45 pm
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    I'd like to see the suncream splattered on her chest

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  • July 17, 2019 at 10:24 pm
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    Put the sunscreens on a pane of fused silica (UV transparent) and measure the transmission. Nah, that's too methodical and rational.

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  • July 18, 2019 at 3:12 am
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    People are so worried about chemical this and chemical that. You know what else is a chemical? The stuff they pump into you during chemo therapy to treat cancer. That's the stuff I want to avoid.

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  • July 19, 2019 at 2:57 pm
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    Great video!!!!! Thank you…but I kept wondering though….about the different SPFs, and how much they can reflect or absorb UV depending on the amount applied….coming from the literature that establishes that the amount needed to really offer the established SPF on label is the determining factor on how effective it is on the claimed protection. It would've been very interesting to see if there is and how much of a difference it makes. Just a though…..thanks!!👍🤗

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  • July 19, 2019 at 9:56 pm
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    Chemical vs physical can also boil down to are chemical bonds being made/broken in the process.

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  • July 19, 2019 at 10:48 pm
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    I'm actually surprised I haven't heard about the sunscreens made from organic chemicals marketed as "organic". Because we all know that "orgainic" means good. As long as your nightshade is organic, it is good for you… Umm…. Wait…

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  • July 20, 2019 at 12:16 pm
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    **Sunscreen above SPF 50 uses a chemical SPF, not a mineral SPF (EG titanium/zinc oxide). Chemical SPF breaks down faster than mineral SPF w/ sun exposure and needs to be applied 20 minutes before sun exposure. Chemical sunscreen needs to be applied more often and absorbs UVA/UVB rays while mineral SPF blocks them. Both types of sunscreen should be applied at least every 2 hours and after exposure to water. Mineral SPF is widely recommended over chemical SPF by Dermatologist.

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  • July 20, 2019 at 4:50 pm
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    UVb is an absolute need for the human body to make adequate vitamin D to keep you healthy, UVa is not but that is what these screens stop.

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  • July 20, 2019 at 5:36 pm
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    Read some pub med, there’s no proof sunscreen prevents cancer and a lot of proof sunscreen causes cancer. If you want to protect yourself from the sun stop eating seed oils. And if you must use sun screen use a natural zinc. This is more industry shill bs selling you the cure to a problem they sold you previously.

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  • July 21, 2019 at 8:23 am
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    So this the only acceptable way to do blackface 😂

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  • July 22, 2019 at 2:28 am
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    Can you try using diy sunscreen?

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  • July 22, 2019 at 3:42 am
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    What I got from this video is that I'd love to have an outdoor couch.

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  • July 22, 2019 at 7:41 pm
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    They Live😎

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  • July 22, 2019 at 7:46 pm
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    I wear a Jimmy Page Mirror Tele.

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  • July 23, 2019 at 1:21 am
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    Í really wonder that foots on couche with shoes … for real that rude and ok ist a outdoor couche but , that Looks like never learn that this is wrong , i mean kid know that you dont do that because Mother get Angry …

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  • July 23, 2019 at 8:47 pm
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    You can be a life saving people thank you for demonstration.

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  • July 25, 2019 at 2:11 pm
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    That was sunblock…….not sunscreen

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  • July 25, 2019 at 3:54 pm
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    Wow. I always though the possible effects of sunblock skin absorbtion were known 😮

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  • July 25, 2019 at 5:57 pm
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    Funny similar controversy (maybe not true controversy). DEET is a great compound for bug spray, but over 20% has been shown to be potentially toxic for children. But the compounds in "natural" bug sprays tend to be worse than kids than DEET

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  • July 25, 2019 at 11:21 pm
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    WHAT ABOUT THE UVC RAYS THAT ARE NOW HITTING EARTH? What’s up with that?

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  • July 25, 2019 at 11:28 pm
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    FDA=Food&Drug Administration not Federal Drug Administration 🙂

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  • July 26, 2019 at 4:52 am
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    Diana, If I gave you a huge piece of highly compressed carbonite that took over a million years to make it the densest piece of rock on the planet, would you be my fiancee? No hurry to the alter, we can slow things way down after you say yes. Giggity giggity!

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  • July 27, 2019 at 3:11 pm
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    how sun rise and sun set seen in UV…??? Can you make a video on them.

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  • July 30, 2019 at 5:48 am
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    im pretty sure they are dating and they just don't want anyone to know so as to protect their channels in case it doesn't work out.

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  • July 30, 2019 at 1:02 pm
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    TAR the most effective sun screen.

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  • July 31, 2019 at 3:52 pm
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    More about environmentally conscious sunscreens please!!!!

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  • August 1, 2019 at 1:34 am
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    I thought the SPF meant the amount of time spent in the sun with protection and then after that time, spf 30= 30 mins, you would not be having protection or you should reapply the sunscreen. This was not talked about in the video, maybe it is right and just on the label or something or maybe I have it wrong…

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  • August 1, 2019 at 1:34 pm
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    Soooo satisfying..

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  • August 2, 2019 at 12:42 am
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    OK! Humans will dip in sunscreen and walk around, cool. How does all the life on planet, plants, animals.. no sun screen and they are fine? or are they also getting affected and no one to help?

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  • August 4, 2019 at 4:05 am
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    Driving around and use that Camera search for hidden places that only people with those cameras can find

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  • August 4, 2019 at 4:46 pm
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    hawaii should ban most people also

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  • August 6, 2019 at 5:27 pm
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    https://www.evangelicalendtimemachine.com/ik-jhwh-zal-u-voor-uw-steun-inzet-en-gebeden-zegenen/

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  • August 6, 2019 at 7:20 pm
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    YOU NEED TO TRY someone who wheres sunscreen religiously VS. someone who never wheres sunscreen

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  • August 9, 2019 at 4:36 am
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    Sometimes as an adult one has to learn how to walk again. God our Father the king of Kings has compassion for you and the prayer of your heart reached Him and my heart is touched also. Continue to trust Him. 🙂

    https://m.youtube.com/watch?v=t6rHHnABoT8&t=304s

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  • August 9, 2019 at 4:43 am
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    https://www.evangelicalendtimemachine.com/seine-goettliche-kraft-zerbricht-die-zaeheste-suendenmacht/

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  • August 10, 2019 at 12:37 am
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    The is a big reason why a higher SPF is better. In the US we have no rating system for UVA rays. The wavelengths that affect DNA, cause wrinkling, destroys collagen and causes cancer. SPF only rates UVB rays that burn. The only guide we have for UVA is an assumed percentage of the SPF.
    In Europe and Asia where the filters available are far superior to US filters they have a PA and PPD rating for UVA.

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  • August 10, 2019 at 11:48 pm
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    30 spf= 97% of rays

    50 spf= 98% of rays

    100 spf= 99% of rays

    Idk if this is all correct but I’m pretty sure I heard it somewhere haha

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  • August 11, 2019 at 3:08 am
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    Looks like that 'Sunblock 5000' from 'Robocop'

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  • August 11, 2019 at 6:19 pm
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    You can’t get anything above spf 50+ in Europe I believe

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  • August 12, 2019 at 9:05 am
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    SOOOOO BLACK PEOPLE SHOULD PUT SUNSCREEN ON FOR WHAAAAT EXACTLY….NAH I'LL USE THE MELANIN I WAS BORN WITH….THANK YOU….NEXT

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  • August 14, 2019 at 1:20 pm
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    The best protection is to go BACK to NORTHERN EUROPE, your ORIGINAL HABITAT and never leave again, remain there

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  • August 14, 2019 at 1:21 pm
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    So you want to be Black and not appear Black

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  • August 15, 2019 at 1:45 am
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    you 2 kids experiment with each other lol

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  • August 17, 2019 at 6:50 am
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    Veritasium also did this…….

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  • August 18, 2019 at 4:40 am
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    Reason why ppl use chemical sunscreen esp on face bc it isnt as irritating and it doesnt leave white cast, easier to blend. Simple lol

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  • August 21, 2019 at 9:49 pm
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    -+$-“

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  • August 23, 2019 at 6:34 pm
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    Imagine aliens just came to earth they can see in UV and landed on beach lmao

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  • August 24, 2019 at 8:12 am
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    The graph for effectiveness of spf is not linear. Which means that while SPF 100 is better than spf 50, the difference between them is still lesser than that of between spf 10 and 50

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  • August 25, 2019 at 9:34 am
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    Oh those eyes. Thanks you lord.

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  • August 27, 2019 at 11:08 am
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    It's sunscreen that contributes to skin cancer
    The sun gives life
    When you eat processed food and I'm not connected to nature this song will give you cancer
    You are connected to nature and eat natural foods the sun will never give you cancer

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  • August 27, 2019 at 11:18 am
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    It seems the people in the comments know more about the UV than you do. You must have gotten you degree at the 5&10 cent store.

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  • August 28, 2019 at 1:06 am
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    Spf does not have anything to do with how strong the sunscreen is. It's how frequently you're supposed to reapply the sunscreen. It's meant to be how long your skin takes to burn without anything on it times the number on the bottle is how long you're supposed to reapply the product. It has absolutely nothing to do with the actual strength of the lotion. So therefore anything over the spf 50 is pointless because you're supposed to reapply after that point normally anyway….. PLEASE PLEASE PLEASE pay attention to this comment! The companies trained us about this while i was a beauty advisor at Walgreens.

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  • August 28, 2019 at 5:36 pm
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    Can’t help but sing “THE SUN IS A DEADLY LASER”

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  • August 28, 2019 at 7:12 pm
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    all the controversy sounds like competitors in the sunscreen throwing up smoke screens for their benifits?

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  • August 29, 2019 at 10:59 pm
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    5:26 Mmmm… 50.

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  • August 30, 2019 at 4:34 am
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    You also show up as white in the UV spectrum. Wouldn't that mean you're reflecting and not absorbing the UV light 🤔 There was barely any difference between your skin and the mineral sunscreen.

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  • September 2, 2019 at 1:23 am
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    She is a hottie. Such a cute personality too

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  • September 2, 2019 at 5:02 am
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    FDA is FOOD and drug administration not "federal drug administration"
    yeah
    get rekt

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  • September 2, 2019 at 5:09 am
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    Are you supposed to wear sunscreen everyday ?

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  • September 3, 2019 at 12:37 pm
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    Why does it look like they're rubbing melanin on themselves

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  • September 7, 2019 at 2:20 pm
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    'ello luv

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  • September 8, 2019 at 7:39 pm
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    If Black = absorbs UV, White = reflects UV, then why is black/absorption better? Seems you'd want to reflect as much as possible.

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  • September 13, 2019 at 9:22 am
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    As a cricket player in South Australia, I'm concerned about sweat too, is my sweat rinsing it off? are the compounds still there to protect me? is zinc better?

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  • September 15, 2019 at 4:05 pm
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    I am curious how if you put lotion (non sunscreen) on your skin and using UV camera to see it. Does it look black as well? Wanna make sure the UV camera really works?

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  • September 19, 2019 at 6:04 am
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    It’s easy to find out what suntan lotion is most affective. Just look at the active ingredient that has the highest percentage.

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