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Why do mirrors flip horizontally (but not vertically)?
Why do mirrors flip horizontally (but not vertically)?
Why do mirrors flip horizontally (but not vertically)?

Why do mirrors flip horizontally (but not vertically)? - Physics Girl

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Physics videos for every atom and eve. Created by Dianna Cowern Mailing address: Physics Girl PO Box 9281 San Diego CA, 92169

Video description
Why do mirrors appear to flip images horizontally but not vertically?

Help us translate our videos!

Featuring guest Meg Chetwood @megatronvolley

Thanks to Kyle Kitzmiller
and Veritasium

Music: "Rhythm Changes," "Locally Sourced"
Are perpetual motion machines possible?

A wheel that spins forever; a bird that never quenches its thirst; a clock that never stops ticking, an endless source of free energy. These are but the dreams of inventors striving to make perpetual motion machines, machines that can work forever without any energy input. Are these machines possible without violating the laws of physics? No. ‪ ‪ ‪ ‪ Help us translate our videos! Unbalanced wheel designed, laser cut and assembled by engineer Kyle Kitzmiller - Writer: Sophia Chen Editors: Jabril Ashe and Dianna Cowern Host: Dianna Cowern Weather footage: NASA Goddard Zimara’s Windmill drawing: Burton Lee Potterveld Cox’s Timepiece drawing - Mr. Cox’s Perpetual Motion,...

What is 6÷2(1+2) = ? The Correct Answer Explained

What is 6÷2(1+2) = ? This problem went viral and generated millions of comments on Facebook, Twitter, YouTube and social media sites. I explain how to get the correct answer by using the modern interpretation of the order of operations. I also explain how you would get a different answer under historical usage of the division symbol. *I get many, many emails about this problem. Before you send an email, check out my blog post or in the links provided below which address every concern I have received so far. If you write to me about this be advised I probably...

Can Silence Actually Drive You Crazy?

*Watch with headphones on! Is 45 minutes really the longest anyone can stay in a perfectly silent, pitch-black room? Support Veritasium on Patreon Check out Audible: Want to watch the whole hour of silence? Many stories have circulated claiming the longest anyone has stayed in an ultra-quiet anechoic chamber is 45 minutes, the reason being any longer would drive you insane. To me this sounded like unsubstantiated rubbish, like the claim the Great Wall is the only manmade structure visible from space. So I put my own psyche on the line, subjecting myself to over an hour of the most intense quiet...

A Padlock with 3 Keys but no Keyholes - Illusion and Confusion

Thanks to Brilliant for sponsoring this episode and supporting Mr.Puzzle! Visit to improve your analytical and problem-solving skills! This massive metal Trick Lock comes together with three different keys. However, what to do with them if the keyholes are obviously missing!? The task, open the locked shackle. My shop: The puzzle shown in this video & further variants are available here: Download the free solution of a similar puzzle and print it: If you are interested in buying this puzzle please support me by using my affiliate links. If you click the link and buy a product, I will receive a commission...

Can you solve the boat puzzle?

You throw a rock in water from your boat. Can you figure out what happens to the water level? Help us translate our videos! Host/Writer/Editor: Dianna Cowern With help from: Jimmy Wong Jake Roper Meg Chetwood More information:

World's Roundest Object!

The world's roundest object helps solve the longest running problem in measurement -- how to define the kilogram. Support Veritasium on Patreon: A kilogram isn't what it used to be. Literally. The original name for it was the 'grave', proposed in 1793 but it fell victim to the French Revolution like its creator, Lavoisier. So begins the tale of the most unusual SI unit. The kilogram is the only base unit with a prefix in its name, and the only one still defined by a physical artifact, the international prototype kilogram or IPK. But the problem with this definition has long been...

Does this look white to you?

When you mix red and green, what do you get? White light is all of the colors, right? So, how do computer screens show you every wavelength of light? Or do they? Help us translate our videos! Host/Writer: Dianna Cowern Editor: Physics Girl has joined PBS Digital Studios! RGB Image: Luís Flávio Loureiro dos Santos,

Only a Genius Or a Person With a Mental Illness Can Answer This

Many psychiatric tests and methods are used in order to find out what is going on in the patient’s head. Here are two simple questions that can be answered only by a person with schizophrenia or by an extraordinary genius person. Subscribe to Bright Side : ---------------------------------------------------------------------------------------- Our Social Media: Facebook: Instagram: 5-Minute Crafts Youtube:  ---------------------------------------------------------------------------------------- For more videos and articles visit:

Why Do Venomous Animals Live In Warm Climates?

Subscribe to Veritasium - it's free! As a Canadian-Australian, I have always wondered why it is that Australia has so many venomous animals that can kill you while Canada has virtually none. But it's not just Australia - it seems like all beautiful, warm places are cursed with venomous native species. So I set out to find the truth: why have all these venomous species evolved in the world's best holiday destinations? I asked chemists, visited the zoo, interviewed entomologists and snake experts. The answer I found was complicated: 1. The majority of venomous species are ectotherms, cold-blooded creatures whose internal temperatures...

Most AMAZING Materials Of The Future!

Check out the most amazing materials of the future! This top 10 list of the strangest and coolest materials shows that science is getting very futuristic nowadays! Subscribe For New Videos! Watch our "UNSOLVED Mysteries That Cannot Be Explained!" video here: Watch our "Most Amazing Cities Found UNDERWATER!" video here: Watch our "MYSTERIOUS Things Discovered In WEIRD Places!" video here: 13. Aerogel Aerogel holds 15 entries in the Guinness Book of Records for material properties, more than any other material. It is the world’s least dense solid. Sometimes called “frozen smoke”, aerogel is made by the supercritical drying of liquid...

Stacked Ball Drop

What happens when you drop a perfectly balanced stack of balls? And how is the result like a supernova? The classic momentum transfer demonstration, taken to the next level. A big thank you to my nephews and niece Drew, Max and Whitney for creating the trampoline footage! Thank you to the Vlogbrothers for sponsoring this video, to Kyle Kitzmiller for filming, and to Island School on Kauai for providing the balls ( Help us translate our videos! Music: YouTube Space Images/animation: NASA

How to Make a Cloud in Your Mouth

Learn how to make a wispy cloud come out of your mouth, even when it's not cold out. Like any awesome trick, physics is to thank for the mouth cloud. This simple and fun demonstration can be used to explain the cloud in a bottle experiment, and real clouds in the sky. Help us translate our videos! Physics Girl has joined PBS Digital Studios! Videography: Forbidden Kingdom Digital - Editing: Dianna Cowern and Forbidden Kingdom Digital Cloud in a Bottle: Bearded Science Guy Moon and Pluto images: NASA Ten Cloud Images: NOAA Spray bottle footage: soraphotography/ Stock Images: Music: Michael Miller - YouTube - "Ersatz Bossa,"...

Photos That Will Change The Way You See The World

For copyright matters please contact us at: Click Here To Subscribe: Like us on Facebook: Follow us on Twitter: Follow us on Instagram: Website : Narrated by: Darren Marlar Thanks for watching! Facts Verse

Why can't you go faster than light?

One of the most counterintuitive facts of our universe is that you can’t go faster than the speed of light. From this single observation arise all of the mind-bending behaviors of special relativity. But why is this so? In this in-depth video, Fermilab’s Dr. Don Lincoln explains the real reason that you can’t go faster than the speed of light. It will blow your mind.

5 cool math tricks ft. Technicality

Math can be fun when you play with the rules, use it to do everyday things like fast math for calculating tips, and do some math magic tricks! Plus, math is the language of physics. Check out these 5 fun math tricks with Alex from Technicality. Check out our fun science experiments video on Alex’s channel, Technicality! Technicality: Help us translate our videos! Creator: Dianna Cowern Editor: Jabril Ashe/Dianna Cowern Writer: Sophia Chen Animations: Kyle Norby Subscribe to Physics Girl for more fun physics! Music: APM


These short, simple life hacks are based on physics. Detangle your headphones, remove sticker residue, check if sunglasses are polarized, cool your car faster, and avoid getting static shock! Check out these Chemistry Life Hacks on ACS Reactions! Check out ACS Reactions Channel: PO BOX ADDRESS: Physics Girl PO Box 9281 San Diego CA, 92169 Creator: Dianna Cowern Editor: Jabril Ashe Animations: Kyle Norby Demonstrations: Ashley Warner Advisor: Dan Walsh Thanks to Elaine Seward and ACS Reactions! Thanks to Kyle Kitzmiller and Sophia Chen Spool Car Toy made by William Osman MORE STATIC ELECTRICITY SCIENCE Headphone Science Source

5 Most Mysterious Time Travel Stories

Previous Videos: Narrated By: Ty Notts Music: Co.AG ___ FB: TW: SUB: ___

Why do medieval buildings overhang their lower floors?

Why do medieval buildings such as cottages and castles overhang their lower floors? The Machicolations shirt: Music: Folk Round by Kevin MacLeod is licensed under a Creative Commons Attribution license ( Source: Artist:

What do programmers actually do?

I left a physics job to do software engineering. Was it worth it? What do software engineers actually do? Thank you to YouTube for sponsoring this video! Subscribe to physics girl: Software engineers and programmers code everything from virtual reality to artificial intelligence to unique instruments like engineer Ben Bloomberg made for musician Jacob Collier. Are you considering new job or career? Me too. PO Box 9281 San Diego, CA 92169 Creator: Dianna Cowern Editing: Jabril Ashe Animations: Kyle Norby and Jabril Ashe Thanks to Ben Bloomberg and Kyle Kitzmiller!

This phenomenon only happens in Hawaii . . . and Cuba & Nigeria & Indonesia & Peru & Sudan & Laos &…

There are apparently no shadows in these images. But they were taken during the brightest part of the day. This episode is brought to you by Squarespace: There are only certain parts of the year and certain times of day when you can experience the subsolar point or Lahaina noon. There appears to be no shadow because the sun is directly overhead. This phenomenon happens twice a year for latitudes between the tropic of cancer and the tropic of capricorn at solar noon, when the sun is highest in the sky. But you have to be in the right place at...

Bell's Theorem: The Quantum Venn Diagram Paradox

Featuring 3Blue1Brown Watch the 2nd video on 3Blue1Brown here: Support MinutePhysics on Patreon! Link to Patreon Supporters: This video is about Bell's Theorem, one of the most fascinating results in 20th century physics. Even though Albert Einstein (together with collaborators in the EPR Paradox paper) wanted to show that quantum mechanics must be incomplete because it was nonlocal (he didn't like "spooky action at a distance"), John Bell managed to prove that any local real hidden variable theory would have to satisfy certain simple statistical properties that quantum mechanical experiments (and the theory that describes them) violate. Since then, GHZ and...

Why Do Americans Write Dates: Month-Day-Year?

Get TunnelBear! - If you happen to like our videos and have a few bucks to spare to support our efforts, check out our Patreon page where we've got a variety of perks for our Patrons, including Simon's voice on your GPS and the ever requested Simon Whistler whistling package: This video is sponsored by TunnelBear →Subscribe for new videos every day! Never run out of things to say at the water cooler with TodayIFoundOut! Brand new videos 7 days a week! More from TodayIFoundOut Why we call the Seasons Summer, Autumn, Winter and Spring The US Plan to Invade Canadа In this...

The Best Banknote in the World!

The story (and science) behind our money. And a cool musical trick. SUBSCRIBE to BrainCraft! Go to and learn more about how you can better plan for your retirement. BrainCraft was created by Vanessa Hill (@nessyhill) and is brought to you by PBS Digital Studios. Talking psychology, neuroscience & why we act the way we do. My Twitter | Instagram Written, Hosted, Produced, Edited and Animated by Vanessa Hill ✌️ Sound Mix by Joel Werner 🎼 With thanks to AFTRS for having us at the YouTube Pop-Up Sydney. Director: Andrew Garrick DP: Steve Arnold Production Designer: Eve Waugh And thanks to Wendy Gray,...

Can you call a cell phone in the microwave?

This episode is brought to you by Squarespace: Applied Hacking with Samy Kamkar: Do cell phones placed in a microwave still receive signals? What is the difference between microwave oven radiation and the signals used by your phone? ‪ ‪ ‪ Help us translate our videos! More resources: Creator: Dianna Cowern Editor: , Jabril Ashe and Dianna Cowern Thanks to ArcAttack: Visuals: and Music: APM and YouTube