The Phantom Singularity | Space Time

January 19th, 2017

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Be sure to check out the Infinite Series episode Singularities Explained https://youtu.be/0pIRibivolA or How I Learned to Stop Worrying and Divide by Zero.

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Isaac Newton’s Universal Law of Gravitation tells us that there is a singularity to be found within a black hole, but scientists and mathematicians have found a number of issues with Newton’s equations. They don’t always accurately represent reality. Einstein’s General Theory of Relativity is a more complete theory of gravity. So does using the General Theory of Relativity eliminate the singularity? No. Not only does it concur with Newton’s Universal Law of Gravitation but it also reveals a second singularity, not at the center of the black hole but at the event horizon.

Previous Episode:

The EM Drive: Fact or Fantasy
https://www.youtube.com/watch?v=hqoo_4wSkdg

Written and hosted by Matt O’Dowd
Produced by Rusty Ward
Graphics by Grayson Blackmon
Made by Kornhaber Brown (www.kornhaberbrown.com)

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Joshua Hillerup
https://www.youtube.com/watch?v=hqoo_4wSkdg&lc=z12efr4gyvmxf3r1e22ucfv5burmibno304

Aaron Schofield
https://www.youtube.com/watch?v=hqoo_4wSkdg&lc=z124efx51vnovn5kc234vppxoxaft3uft

Stephen Bachman
https://www.youtube.com/watch?v=hqoo_4wSkdg&lc=z132i1xoltauujs2a23zwxlrdsftghtvm

Matthew Scatterty
https://www.youtube.com/watch?v=hqoo_4wSkdg&lc=z13rel4r1qvbidayv04chrfxzxv4glwql20

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Posted in Physics |

The EM Drive: Fact or Fantasy?

January 12th, 2017

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Because you demanded it … we break down the EM Drive!

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In the first Space Time Journal Club, Matt O’Dowd discusses Eagleworks Labs recent paper on the EM Drive and evaluates what their findings really tell us.

“Measurement of Impulsive Thrust from a Closed Radio-Frequency Cavity in Vacuum”
White, March, Lawrence, Vera, Sylvester, Brady & Bailey 2016
Abstract: http://arc.aiaa.org/doi/10.2514/1.B36120
PDF: http://arc.aiaa.org/doi/pdf/10.2514/1.B36120

Written and hosted by Matt O’Dowd
Produced by Rusty Ward
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Made by Kornhaber Brown (www.kornhaberbrown.com)

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Harlan Kempf
https://www.youtube.com/watch?v=Ttwl_zH_DZ8&lc=z13sdncwxpzpejj3f23ohxsz5ubds3ppf04

Sun Power Guru
https://www.youtube.com/watch?v=Ttwl_zH_DZ8&lc=z13atterhtvmybvpv04cefkrfuu0gvcgdc4

Richy Rich
https://www.youtube.com/watch?v=Ttwl_zH_DZ8&lc=z13odxehmyveftz2d22ytbjopunwdvfdo

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Posted in Physics |

The Absurdity of Detecting Gravitational Waves

January 5th, 2017

A head-vaporizing laser with a perfect wavelength detecting sub-proton space-time ripples.
Huge thanks to Prof Rana Adhikari and LIGO: http://ligo.org
Here’s how he felt when he learned about the first ever detection: https://youtu.be/ViMnGgn87dg

Thanks to Patreon supporters:
Nathan Hansen, Donal Botkin, Tony Fadell, Saeed Alghamdi, Zach Mueller, Ron Neal
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A lot of videos have covered the general overview of the discovery of gravitational waves, what they are, the history of the search, when they were found but I wanted to delve into the absurd science that made the detection possible.

When scientists want one megawatt of laser power, it’s not just for fun (though I’m sure it’s that too), it’s because the fluctuations in the number of photons is proportional to their square root, making more powerful beams less noisy (as a fraction of their total). The smoothest mirrors were created not for aesthetic joy but because when you’re trying to measure wiggles that are a fraction the width of a proton, a rough mirror surface simply won’t do.

Filmed by Daniel Joseph Files

Music by Kevin MacLeod, http://www.incompetech.com “Black Vortex” (appropriately named)

Music licensed from Epidemic Sound http://epidemicsound.com “Observations 2” (also appropriately named)

Posted in Uncategorized |

How to See Black Holes + Kugelblitz Challenge Answer

January 4th, 2017

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Find out how scientists are mapping the black holes throughout the Milky Way and beyond as well as the answer to the Escape the Kugelblitz Challenge Question. Were you able to save humanity?

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Quasars, X-ray Binaries and Supermassive voids at the center of our galaxies … black holes take many forms. In this episode Matt tells us what these different types of black holes are and how scientists are using VLBI, Very Long Baseline Interferometry, to map the different black holes throughout the known universe.

Resolving Microlensing Events with Triggered VLBI
Karami, Broderick, Rahvar, and Reid, 2016, The Astrophysical Journal, 833, 169
http://phys.org/news/2016-12-black-holes-years-method.html
https://arxiv.org/abs/1601.05801

Last Episode – Have They Seen Us?
https://www.youtube.com/watch?v=Ttwl_zH_DZ8

The Escape the Kugelblitz Challenge Question
https://www.youtube.com/watch?v=v3hd3AI2CAA&t=5s

Written and hosted by Matt O’Dowd
Produced by Rusty Ward
Graphics by Grayson Blackmon
Made by Kornhaber Brown (www.kornhaberbrown.com)

Challenge Winners:
Pete Benzi
Srikanth Reddy
Dominique
Jeremy Elser
Mathieu Pütz
Scott Seaver

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Posted in Physics |

Have They Seen Us? | Space Time | PBS Digital Studios

December 22nd, 2016

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Are aliens watching Earth TV? We’d like to credit the SKA Organization for the image used in the thumbnail.

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Sources and further reading:

The Square Kilometer Array
https://www.skatelescope.org/

Eavesdropping on Radio Broadcasts from Galactic Civilizations with Upcoming Observatories for Redshifted 21cm Radiation
Loeb & Zaldarriaga 2007, Journal of Cosmology and Astroparticle Physics, 1, 20
https://arxiv.org/pdf/astro-ph/0610377v2.pdf

Costs and Difficulties of Large-Scale ‘Messaging’, and the Need for International Debate on Potential Risks
Billingham & Bedford 2011
https://arxiv.org/abs/1102.1938
Previous Episode:
https://www.youtube.com/watch?v=v3hd3AI2CAA

Written and hosted by Matt O’Dowd
Produced by Rusty Ward
Graphics by Grayson Blackmon
Made by Kornhaber Brown (www.kornhaberbrown.com)

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Luca$sino
https://www.youtube.com/watch?v=mht-1c4wc0Q&lc=z13vdbfbuu2pthqlt23eg33qpofgxdy5c04

Douglas Oak
https://www.youtube.com/watch?v=mht-1c4wc0Q&lc=z133j1mrzkqbiramx22ovtvw0pbccfkna

Grin Reaper Of Trolls
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viermidebutura3
https://www.youtube.com/watch?v=mht-1c4wc0Q&lc=z13lu5cxbuqzjnnvt23scf0a1kzgdntrb04

Cornerrecord
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Posted in Physics |

Post-Truth: Why Facts Don’t Matter Anymore

December 20th, 2016

Why we can’t seem to agree on what’s true when it’s easier than ever to check.
Videos like this are usually on 2Veritasium: http://bit.ly/2Veritasium
Support Veritasium on Patreon: http://bit.ly/VePatreon

This video was filmed at a meetup in Stockholm, Sweden on Dec. 9, 2016. Huge thanks to everyone who attended – I had a great time. Sorry to those of you I missed, especially Lund and Gothenburg.

Thanks to Patreon supporters (but this is a non-paid post):
Meshal Alshammari, Nathan Hansen, Bryan Baker, Donal Botkin, Tony Fadell, Saeed Alghamdi, Ron Neal

Posted in Uncategorized |

Escape The Kugelblitz Challenge

December 15th, 2016

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If you know enough about astrophysics you could save the world from alien attack.

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In the last episode Matt discussed how the Penrose Diagram enabled you to map how black holes affect Space Time. In this episode you can use that knowledge to stop an all-too-real threat to our planet. Aliens are trying to destroy the Earth by creating a Kugelblitz under our feet. Will you use a Dyson Sphere to stop them or a satellite based deflector array? Choose wisely and save humanity. Choose poorly and … well, let’s just hope you choose wisely.

Last Episode – What Happens at the Event Horizon?
https://www.youtube.com/watch?v=mht-1c4wc0Q

Written and hosted by Matt O’Dowd
Produced by Rusty Ward
Graphics by Grayson Blackmon
Made by Kornhaber Brown (www.kornhaberbrown.com)

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Posted in Physics |

What Happens at the Event Horizon? | Space Time | PBS Digital Studios

December 8th, 2016

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What really happens when you approach the event horizon of a black hole? What do you see when you actually cross it? Matt shows you an elegant tool for understanding this mysterious region of spacetime. This episode is supported by The Great Courses Plus. Go to http://ow.ly/WPIo306GotR for your one month free trial!

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CUNY Physics (stay tuned for event April 7 event details):
http://www.gc.cuny.edu/Page-Elements/Academics-Research-Centers-Initiatives/Doctoral-Programs/Physics

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Written and hosted by Matt O’Dowd
Produced by Rusty Ward
Graphics by Grayson Blackmon
Made by Kornhaber Brown (www.kornhaberbrown.com)

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dinosaurfromfuture
https://www.youtube.com/watch?v=RlXdsyctD50&lc=z12cw3dapnftev0z104ce5pyzqaejbrwpg0

vacuum diagram
https://www.youtube.com/watch?v=RlXdsyctD50&lc=z13gwn3p1tndfdyuj23md5ipdy2xvb33y

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Posted in Physics |

Indestructible Coating?!

December 5th, 2016

Used in everything from bullet-proof vests to the walls of the Pentagon, polyurea’s strength comes from its long-chain molecules.
Check out How Ridiculous: http://bit.ly/VeHowRidiculous
Snatoms magnetic molecules: http://bit.ly/VeSnatoms
Veritasium on Patreon: http://bit.ly/VePatreon

Special thanks to South Bay Line-X: http://southbaylinex.com/

Thanks to Patreon supporters:
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Filmed by Prashanth Venkataramanujam

SFX by A Shell in the Pit

Posted in Uncategorized |

Pilot Wave Theory and Quantum Realism | Space Time | PBS Digital Studios

December 1st, 2016

There’s one interpretation of the meaning of quantum mechanics that manages to skip a lot of the unphysical weirdness of the mainstream interpretations: it’s de Broglie-Bohm pilot wave theory.

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There are some pretty out-there explanations for the processes at work behind the incredibly successful mathematics of quantum mechanics – things are both waves and particles at the same time, the act of observation defines reality, cats are alive and dead, or even: the universe is constantly splitting into infinite alternate realities. The weird results of quantum experiments seem to demand weird explanations of the nature of reality. In this episode, Matt discusses de Broglie-Bohm pilot wave theory, the one interpretation of quantum mechanics that remains comfortably, stodgily physical.

Links to Sources

The Quantum Experiment that Broke Reality
https://www.youtube.com/watch?v=p-MNSLsjjdo&t=53s

The Many Worlds of the Quantum Multiverse
https://www.youtube.com/watch?v=dzKWfw68M5U&t=690s

Is This What Quantum Mechanics Looks Like?
https://www.youtube.com/watch?v=WIyTZDHuarQ

A Suggested Interpretation of the Quantum Theory in Terms of “Hidden” Variables. I:
David Bohm, 1952, Phys. Rev. 85, 166
http://journals.aps.org/pr/abstract/10.1103/PhysRev.85.166

Bohms original paper is behind the journal paywall (sorry!), however many other readings on Bohmian mechanics are available here:
http://www.bohmian-mechanics.net/readings_books.html

Previous Space Time Episode
https://www.youtube.com/watch?v=u4RNGRyzt10

Written and hosted by Matt O’Dowd
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Comments Answered by Matt

Burak Bağdatlı
https://www.youtube.com/watch?v=u4RNGRyzt10&lc=z13hvpcjrlndslnyb04cctjqrvb4hpkphe4

Sebastián López
https://www.youtube.com/watch?v=u4RNGRyzt10&lc=z124yxrjyw3ywvicm23wspagcxracphvg

The757packerfan
https://www.youtube.com/watch?v=u4RNGRyzt10&lc=z13ujbnznvmfjnhag04cgtprtriafnj4t2k

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Posted in Physics |

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