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Understanding Quantum Mechanics

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There are plenty of real-world applications for quantum mechanics you may not realized are at the tips of your fingers, and quantum physics is to thank. Have you ever teased a cat with a stream of hyper-focused, nanoscopic, physical reactions? You probably call this phenomena a laser—but in the world of science, it's a perfect example of quantum mechanics in action. Quantum mechanics is a subsection of physics not many people know much about. Described as a set of scientific rules and properties as strange as they are versatile, quantum mechanics allows subatomic particles to create noise, travel through walls, shape radio waves and frequencies and much more. In fact, without the existence of quantum physics, the sun would explode and our eyes would likely pop out due to unchecked light energy hurling toward Earth. Luckily, quantum mechanics is busy at work regulating the amount of photons entering the atmosphere.

So how do these scientific rules govern everything from radio waves, to internal compasses found in bird brains to our sense of smell? And why don't we know more about what informs the outcomes of quantum reactions? This playlist gives you an inside look into the many ways in which our daily lives are influenced by the invisible, but powerfully awesome, laws of quantum mechanics.

02:41
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Read more:http://www.newscientist.com/article/mg21829131.900 What happens when our two greatest theories of reality meet? Soon quantum theory and relativity could be slugging it out above our heads Watch more YouTube Geek Week videos at http://youtube.com/geekweek
09:09
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SUBSCRIBE to our channel: http://goo.gl/aLpxX PART TWO is here: http://goo.gl/Lai6G __ Quantum-entangled twins or hoaxsters? In this dramatized film Scientific American editors George Musser and John Matson try to convince a colleague that their brains are entangled on the subatomic level. -- For our latest videos visit the Scientific American video page http://scientificamerican.com/video.cfm or subscribe via RSS http://rss.sciam.com/sciam/global-videos
06:00
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Veritasium t-shirts! http://dft.ba/-vetshirt Supported by TechNYou: http://bit.ly/19bBX5G Subscribe to Veritasium - it's FREE! http://bit.ly/YSWpWm How does a transistor work? Our lives depend on this device. When I mentioned to people that I was doing a video on transistors, they would say "as in a transistor radio?" Yes! That's exactly what I mean, but it goes so much deeper than that. After the transistor was invented in 1947 one of the first available consumer technologies it was applied to was radios, so they could be made portable and higher quality. Hence the line in 'Brown-eyed Girl' - "going down to the old mine with a transistor radio." But more important to our lives today, the transistor made possible the microcomputer revolution, and hence the Internet, and also TVs, mobile phones, fancy washing machines, dishwashers, calculators, satellites, projectors etc. etc. A transistor is based on semiconductor material, usually silicon, which is 'doped' with impurities to carefully change its electrical properties. These n and p-type semiconductors are then put together in different configurations to achieve a desired electrical result. And in the case of the transistor, this is to make a tiny electrical switch. These switches are then connected together to perform computations, store information, and basically make everything electrical work intelligently. Special thanks to PhD Comics for awesome animations: http://bit.ly/16ZXcVY And thanks to Henry Reich and Vanessa Hill for reviews of earlier drafts of this video. Music: Kevin MacLeod (incompetech.com) Decisions
04:20
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Complete video at: http://fora.tv/2009/05/23/Marcus_Chown_in_Conversation_with_Fred_Watson Marcus Chown, author of Quantum Theory Cannot Hurt You: A Guide to the Universe, discusses the mechanics behind quantum computers, explaining that they function by having atoms exist in multiple places at once. He predicts that quantum computers will be produced within 20 years. ----- The two towering achievements of modern physics are quantum theory and Einsteins general theory of relativity. Together, they explain virtually everything about the world in which we live. But almost a century after their advent, most people havent the slightest clue what either is about. Radio astronomer, award-winning writer and broadcaster Marcus Chown talks to fellow stargazer Fred Watson about his book Quantum Theory Cannot Hurt You. - Australian Broadcasting Corporation Marcus Chown is an award-winning writer and broadcaster. Formerly a radio astronomer at the California Institute of Technology, he is now cosmology consultant of the weekly science magazine New Scientist. The Magic Furnace, Marcus' second book, was chosen in Japan as one of the Books of the Year by Asahi Shimbun. In the UK, the Daily Mail called it "a dizzy page-turner with all the narrative devices you'd expect to find in Harry Potter". His latest book is called Quantum Theory Cannot Hurt You.
01:47
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Chris wants to generate Random Letters in a 26 x 26 Grid. Using the Ascii set of letters and a few tricks, Bill "MrExcel" Jelen shows us how to produce the grid in question. Follow along with Bill, in Episode #1698, as he goes through the 'how-to' on this topic and shows us the results. And for more information on Excel 2013, check out "Microsoft 2013 InDepth" -- by Bill Jelen. Excel 2013 In Depth is the beyond-the-basics, beneath-the-surface guide for everyone working with Excel 2013. Excel expert and MVP Bill Jelen provides specific, tested, proven solutions to the problems Excel users run into every day: the types of challenges other books ignore or oversimplify. Jelen thoroughly covers all facets of working with Excel 2013. http://www.mrexcel.com/store/index.php?l=product_detail&p=254 "The Learn Excel from MrExcel Podcast Series" Visit us: www.MrExcel.com for all of your Microsoft Excel Needs!
13:41
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MIT 6.007 Electromagnetic Energy: From Motors to Lasers, Spring 2011 View the complete course: http://ocw.mit.edu/6-007S11 Instructor: Yu Gu License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
57:51
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Google Tech Talks January, 24 2008 ABSTRACT Quantum cryptography is actually about secure distribution of an encryption key between two parties. In this talk I give an introduction to practical quantum cryptography. I will describe the technical details of a few implementations, how the security of the distributed key might be compromised, and what steps can be taken to prevent this. Speaker: Alexander Ling Alexander Ling is a graduate student with the Experimental Quantum Optics group in the Center for Quantum Technologies in Singapore. He has spent the last four years building sources of high-quality polarization-entangled photon-pairs. The entangled light is then used for various things like testing the validity of quantum mechanics and quantum key distribution. He hopes to complete his Ph.D. in 4 months.
04:03
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Full lecture: http://www.youtube.com/watch?v=0NbBjNiw4tk Theoretical physicist Michio Kaku explains the basics of String Theory in this clip from his Floating University lecture.
03:05
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Those laser pointers you can buy at the store actually pack some pretty powerful technology, and a recent study shows most manufacturers are actually jacking up their pointers' power output to illegal levels- meaning some consumer pointers have the ability to burn retinas and skin and blind airline pilots! Read More: "A look at the hazards of green laser pointers" http://phys.org/news/2013-04-hazards-green-laser-pointers.html "Those handheld green lasers pointers may not be as harmless as you thought." "NIST Tests Underscore Potential Hazards of Green Laser Pointers" http://www.nist.gov/pml/div686/pointer-032013.cfm "Using a low-cost apparatus designed to quickly and accurately measure the properties of handheld laser devices, National Institute of Standards and Technology (NIST) researchers tested 122 laser pointers and found that nearly 90 percent of green pointers and about 44 percent of red pointers tested were out of compliance with federal safety regulations. The NIST test apparatus was designed so that it can be replicated easily by other institutions." DNews is a show about the science of everyday life. We post two new videos every day of the week. Watch More http://www.youtube.com/dnewschannel Subscribe http://www.youtube.com/channel/UCzWQYUVCpZqtN93H8RR44Qw?sub_confirmation=1 DNews Twitter https://twitter.com/dnews Anthony Carboni Twitter: https://twitter.com/acarboni Laci Green Twitter https://twitter.com/gogreen18 Trace Dominguez Twitter https://twitter.com/trace501 DNews Facebook http://www.facebook.com/DNews DNews Google+ https://plus.google.com/u/0/106194964544004197170/posts DNews Website http://discoverynews.com/