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Heisenberg's uncertainty principle tells us that it is impossible to simultaneously measure the position and momentum of a particle with infinite precision. In our everyday lives we virtually never come up against this limit, hence why it seems peculiar. In this experiment a laser is shone through a narrow slit onto a screen. As the slit is made narrower, the spot on the screen also becomes narrower. But at a certain point, the spot starts becoming wider. This is because the photons of light have been so localised at the slit that their horizontal momentum must become less well defined in order to satisfy Heisenberg's uncertainty principle.
I based this video on one by Prof. Walter Lewin of MIT: http://bit.ly/100Wk2K
Henry (MinutePhysics) has previously made a video about Heisenberg's Uncertainty Principle where he treats it as less spooky and more a consequence of waves: http://bit.ly/TV3xO5
Sixty Symbols has a great video on Planck's constant: http://bit.ly/11upebY
Thanks to the University of Sydney for hosting this experiment, especially to Tom and Ralph for their assistance getting it working.
Music: Kevin McLeod (Incompetech.com) Mirage and Danse Macabre
Lift is an important concept, not only in flying but also in sailing. This week I'm talking to Olympic Sailor, Hunter Lowden. But before I get to the physics of sailing I thought I would explain lift since it's generally poorly understood.
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Music by Nathaniel Schroeder
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A boomerang can execute its unique roundtrip flight by making use of three fundamental physics principles: lift, relative velocity, and gyroscopic precession.
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This short was made in support of #TeamWater
💧Support Team Water Here: https://www.TeamWater.org
The biggest YouTuber collab just happened on YouTube! Hundreds of creators got together to post a video about Team Water, a fundraiser launched by @MrBeast and @MarkRober to raise $40 million to give people all over the world clean drinking water!
Special thanks to Xi Shen and his team at The Hong Kong Polytechnic University for all their help. ACS Energy Lett. 2025, 10, 7, 3419–3429.
Neil deGrasse Tyson interviews Avatar director James Cameron and discusses the intersection of storytelling, exploration and science with Chuck Nice and Charles Liu.
StarTalk | S3, E9
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#NationalGeographic #StarTalk #JamesCameron
About National Geographic:
National Geographic is the world's premium destination for critically acclaimed storytelling around science and exploration. Discover amazing wildlife, ancient civilizations, hidden worlds, and the incredible wonders of our Earth. Through world-class scientists, photographers, journalists, and filmmakers, Nat Geo inspires fans of all ages to connect with, explore, and care about the world.
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Storytelling & Science with James Cameron (Full Episode) | StarTalk | National Geographic
https://youtu.be/z5d6RvbQbTg
National Geographic
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In this Season 2 Trafficked with Mariana van Zeller mega episode compilation, Mariana van Zeller takes us into the hidden world of black market trade. Featuring five full episodes:
Black Market Surgery
Mariana van Zeller investigates underground plastic surgery, from motel-room operations to a deadly revelation about Miami’s discount surgery centers.
Romance Scams
Mariana journeys from America’s heartland to the cafes of Ghana to meet the romance scammers fleecing Americans out of millions.
Black Market Marijuana
Mariana sets off on a wild journey through California’s black market for weed, which has mushroomed since marijuana legalization four years ago.
Outlaw Motorcycle Clubs
Mariana van Zeller investigates outlaw motorcycle gangs known as 1% clubs, learning about the bonds of brotherhood that fuel these violent groups.
Meth
Mariana van Zeller follows a meth superhighway from a cartel-run lab in Sinaloa across the border and into the lives of American users.
Trafficked with Mariana Van Zeller | S2, E1 - 5
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#MegaEpisode #TraffickedWithMarianaVanZeller #NationalGeographic
About National Geographic:
National Geographic is the world's premium destination for critically acclaimed storytelling around science and exploration. Discover amazing wildlife, ancient civilizations, hidden worlds, and the incredible wonders of our Earth. Through world-class scientists, photographers, journalists, and filmmakers, Nat Geo inspires fans of all ages to connect with, explore, and care about the world.
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Investigating Black Market Ventures | Trafficked Season 2 MEGA EPISODE | National Geographic
https://youtu.be/wAOMeo-DiiA
National Geographic
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Cave dwelling is an ancient way of life that's still practiced, but it is becoming increasingly rare. Nat Geo Explorer Tamara Merino, and writer John Bartlett are exploring the societies of some of the world's last cave dwellers and documenting the people who are keeping this time-honored human tradition alive.
Learn more about cave living: https://on.natgeo.com/46H6qLI
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#NationalGeographic #Caves #Exploration
About National Geographic:
National Geographic is the world's premium destination for critically acclaimed storytelling around science and exploration. Discover amazing wildlife, ancient civilizations, hidden worlds, and the incredible wonders of our Earth. Through world-class scientists, photographers, journalists, and filmmakers, Nat Geo inspires fans of all ages to connect with, explore, and care about the world.
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While increasingly rare, cave dwelling is an ancient way of life still practiced 📸 #NatGeo
https://youtube.com/shorts/GbRFI5MFDRQ
National Geographic
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Training exercises in offensive dogfighting at extreme speeds are among the most difficult tests the pilots undergo, but they're also an opportunity to prove that they really are the best of the best.
Top Guns: The Next Generation is now streaming on Disney+ and Hulu.
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#NationalGeographic #TopGunsTheNextGeneration #TopGuns
About National Geographic:
National Geographic is the world's premium destination for critically acclaimed storytelling around science and exploration. Discover amazing wildlife, ancient civilizations, hidden worlds, and the incredible wonders of our Earth. Through world-class scientists, photographers, journalists, and filmmakers, Nat Geo inspires fans of all ages to connect with, explore, and care about the world.
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What is offensive dogfighting training really like? #TopGunsTheNextGeneration
https://youtube.com/shorts/O8nLG5zDpMs
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In this exclusive interview, Chris Hemsworth returns to discuss the highly anticipated new season of his documentary series, Limitless: Live Better Now. Hear from the actor himself as he delves into how his life has changed since the first season of the series, what drew him to return for more adventures, and the incredible challenges he experienced in the new season.
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#NationalGeographic #LimitlesssWithChrisHemsworth #ChrisHemsworth
About National Geographic:
National Geographic is the world's premium destination for critically acclaimed storytelling around science and exploration. Discover amazing wildlife, ancient civilizations, hidden worlds, and the incredible wonders of our Earth. Through world-class scientists, photographers, journalists, and filmmakers, Nat Geo inspires fans of all ages to connect with, explore, and care about the world.
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Chris Hemsworth Reveals his Toughest Challenges | Limitless: Live Better Now | National Geographic
https://youtu.be/gOVERIRBqrc
National Geographic
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The legendary 24lb golden mask of King Tut is one of the most iconic artifacts of Ancient Egypt, but what if it wasn't made for him? In this National Geographic Full Episode of Tut's Treasures: Hidden Secrets, we dive into the debate surrounding the mask and uncover evidence, including a damaged nameplate (cartouche) and unusual craftsmanship, that has led many scholars to believe the mask was originally made for his female ancestor, Queen Nefertiti.
Tut's Treasures: Hidden Secrets | S1, E2
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#NationalGeographic #FullEpisode #TutsTreasures #HiddenSecrets
About National Geographic:
National Geographic is the world's premium destination for critically acclaimed storytelling around science and exploration. Discover amazing wildlife, ancient civilizations, hidden worlds, and the incredible wonders of our Earth. Through world-class scientists, photographers, journalists, and filmmakers, Nat Geo inspires fans of all ages to connect with, explore, and care about the world.
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The Truth About King Tut's Golden Mask (Full Episode) | Tut's Treasures: Hidden Secrets | Nat Geo
https://youtu.be/UmL4uPn6xe0
National Geographic
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Paid content for @PepsiCo. Travel to Thailand with Nat Geo photographer Rena Effendi and meet a multigenerational rice and potato farmer. Discover how she is tackling climate change and increasingly destructive natural disasters by implementing farming techniques that work in harmony with the land, and by passing those practices on to her community.
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#NationalGeographic #Thailand #Farming
About National Geographic:
National Geographic is the world's premium destination for critically acclaimed storytelling around science and exploration. Discover amazing wildlife, ancient civilizations, hidden worlds, and the incredible wonders of our Earth. Through world-class scientists, photographers, journalists, and filmmakers, Nat Geo inspires fans of all ages to connect with, explore, and care about the world.
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Regeneration in Action | Farming Preservation in Thailand | National Geographic
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The warm, shallow waters of the Gulf of Mexico are a thriving hub of industry and commerce, but they’re also rocket fuel for hurricanes. The Gulf Coast has been decimated in the past, but every time the marine and coastal economies bounce back. With more people, more ships, more fishermen and more oil platforms here than ever before, three major storms will bring a new level of devastation.
Gathering Storm | S1, E2
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#NationalGeographic #GatheringStorm #FullEpisode
About National Geographic:
National Geographic is the world's premium destination for critically acclaimed storytelling around science and exploration. Discover amazing wildlife, ancient civilizations, hidden worlds, and the incredible wonders of our Earth. Through world-class scientists, photographers, journalists, and filmmakers, Nat Geo inspires fans of all ages to connect with, explore, and care about the world.
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Devastating Gulf Storms (Full Episode) | Gathering Storm | National Geographic
https://youtu.be/V0lmSPb6NfA
National Geographic
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Neil deGrasse Tyson features his interview with Jane Goodall and discusses chimpanzee behavior with Chuck Nice and Jill Pruetz.
Jane Goodall 1934 - 2025
Startalk | S3, E3
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#NationalGeographic #Startalk #JaneGoodall
About National Geographic:
National Geographic is the world's premium destination for critically acclaimed storytelling around science and exploration. Discover amazing wildlife, ancient civilizations, hidden worlds, and the incredible wonders of our Earth. Through world-class scientists, photographers, journalists, and filmmakers, Nat Geo inspires fans of all ages to connect with, explore, and care about the world.
Get More National Geographic:
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Jane Goodall: Discussing Chimpanzee Behavior (Full Episode) | Startalk | National Geographic
https://youtu.be/Ztjcf7iR5DE
National Geographic
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JANE GOODALL: THE HOPE illustrates how one woman’s passion for wildlife and unshakable drive have persevered and set an example for future generations.
In 1960, Dr. Jane Goodall’s early fieldwork observing chimpanzees at Gombe Stream Game Reserve, in Tanganyika (now Tanzania), unveiled groundbreaking research of shared behaviors between humans and apes.
The Jane Goodall Institute announced on October 1, 2025, that Jane Goodall died at 91. A primatologist, conservationist, animal advocate, educator, and National Geographic Explorer, her work revolutionized our understanding of the natural world.
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#FullEpisode #JaneGoodall #NationalGeographic
About National Geographic:
National Geographic is the world's premium destination for critically acclaimed storytelling around science and exploration. Discover amazing wildlife, ancient civilizations, hidden worlds, and the incredible wonders of our Earth. Through world-class scientists, photographers, journalists, and filmmakers, Nat Geo inspires fans of all ages to connect with, explore, and care about the world.
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Jane Goodall: The Hope (Full Episode) | SPECIAL | National Geographic
https://youtu.be/4ST6pqfCTy0
National Geographic
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