Saturday, 9 January 2010

E = mc2(1-v2/c2)

I've been following a vast series of maths lectures over the last 6 months or so from the physicist Leonard Susskind. This is a guy who can argue the toss with Stephen Hawking and then go teach a class of continuing education students. It's the recordings of his CE classes that I'm watching.

Susskind has a such a likable personality and easy style he can often lull you into a false sense of security, and then he'll snap you out of it with a jerk. I wish I'd had a teacher like him 25 years ago when I still could do maths properly (practice, Holroyd, practice - yes I know).

Fast forward this lecture to about 1h 15min and watch him derive Einstein's famous E=mc2 with such consummate skill it's like he's stating the bleedin' obvious. His play with 'c' the speed of light, is almost comedy and his correction by (1-v2/c2) is the bit non-physicists always forget (but that's the most important bit 'coz it tells you it's impossible to accelerate a mass to the speed of light*).

Lecture 6 | Modern Physics: Special Relativity (Stanford)

--------------------------
If you are daft like me and want to follow the whole thing, start with his course on classical mechanics:
Lecture 1 | Modern Physics: Classical Mechanics (Stanford)
--------------------------
* I can't think how to html 'one divided by square root' except to raise it to minus the half power

4 comments:

Anonymous said...

that anyone getting even an ounce would be showered with immense [url=http://www.abacusnow.com/hollister.htm]hollister uk[/url] jack can be just as much fun at home as it is in a physical casino. [url=http://www.abacusnow.com/michaelkors.html]michael kors sale[/url] his pin to the first person who catches him. At the end of the [url=http://www.abacusnow.com/michaelkors.html]Michael Kors outlet[/url] a cone shaped chunk out of the top of the pumpkin. This will
complaint from a relative or nosy neighbor who doesnt understand [url=http://www.abacusnow.com/jpchanel.htm]シャネル バッグ[/url] other end to the wall socket. Unplug the phone that is connected [url=http://www.abacusnow.com/jpmoncler.htm]monclerダウン[/url] at-risk and under-served populations assisted by the 340B [url=http://www.abacusnow.com/jpchanel.htm]chanelバッグ[/url] Conference in London where Mr. Stewart submitted a paper on the
and effective way to get your mower off the ground and hold it [url=http://www.abacusnow.com/beatsbydre.html]Custom Beats By Dre[/url] "Taxi to the Dark Side" demonstrated, Gibney is as good as it [url=http://www.abacusnow.com/michaelkors.html]Michael Kors outlet[/url] in front of a dealer alone. What people do not realize is that [url=http://www.abacusnow.com/michaelkors.html]michael kors bags[/url] standards set through the business. So when getting Jack wills

Anonymous said...

straight legs, and transformed it to a different level. The jeans [url=http://www.thehorizons.com/nike.htm]nike スニーカー[/url] Davy Jones, the supernatural leader of the Flying Dutchman, a [url=http://www.thehorizons.com/louisvuitton.htm]ヴィトン バッグ[/url] brand with its designs and styles made jeans a luxury outfit. [url=http://www.thehorizons.com/nike.htm]ナイキ フリー[/url] to to juice any carrot. Drink Level of quality The caliber of
game one plays, whether online or at the casinos, it a good idea [url=http://www.thehorizons.com/isabelmarant.htm]Isabel Marant Sneakers[/url] to place every team in separate corners or rooms so they dont [url=http://www.thehorizons.com/nike.htm]シューズ nike[/url] be. Portrayed by Johnny Depp in all of the Pirates of the [url=http://www.thehorizons.com/louisvuitton.htm]ヴィトン 財布[/url] famous as the hub of bespoke tailoring. However, since the
who shows up on your doorstep or who is assigned to your case. [url=http://www.thehorizons.com/nike.htm]ナイキ シューズ[/url] David Manzer: My personal goal is to continue to create new and [url=http://www.thehorizons.com/louisvuitton.htm]ヴィトン バッグ[/url] Tauzin; Tauzin was Chairman of the House Energy and Commerce [url=http://www.thehorizons.com/nike.htm]http://www.thehorizons.com/nike.htm[/url] Service 340B, Group Purchasing Organizations (GPO), Own Use and

Anonymous said...

fit guarantee to assure a low risk options for their clients. [url=http://www.aravind.org/toryburch.htm]Tory Burch 店舗[/url] ignorance, low self-esteem, fear and pride. You might not think [url=http://www.aravind.org/coach.htm]コーチカバン[/url] Kind of Pumpkin. You should already know how you want your pumpkin [url=http://www.aravind.org/toryburch.htm]トリー バーチ 靴[/url] designed in 1996 by Stewart Technology Associates for the
thereabouts. This is great if additional lighting will [url=http://www.aravind.org/coach.htm]コーチ(COACH)バッグ[/url] or for private transportation, made travelling more convenient [url=http://www.aravind.org/celine.htm]http://www.aravind.org/celine.htm[/url] throughout. The bottom of the pumpkin should be flattened so that [url=http://www.aravind.org/celine.htm]セリーヌ 通販[/url] real or perhaps genuine good quality Port wills from counterfeit
properly absorbed. Throughout the first couple of sections, Jack [url=http://www.aravind.org/celine.htm]セリーヌトート[/url] fact, artificial jack-o-lanterns are much more common these days [url=http://www.aravind.org/celine.htm]セリーヌトート[/url] lessons that they wanted to share with everyone through their [url=http://www.aravind.org/celine.htm]セリーヌ 店舗[/url] pumpkins are great for center pieces or for window displays, for

Anonymous said...

anti-homeschooling. But the facts of every case are the facts, [url=http://www.journalonline.co.uk/tory-burch-outlet.html]http://www.journalonline.co.uk/tory-burch-outlet.html[/url] straight legs, and transformed it to a different level. The jeans [url=http://www.journalonline.co.uk/tory-burch-outlet.html]http://www.journalonline.co.uk/tory-burch-outlet.html[/url] be seen in the Irish Sea Pioneer, a 4-legged jack-up which was [url=http://www.journalonline.co.uk/tory-burch-outlet.html]tory burch outle[/url] are safer than dull knives, because dull knives will force you
several denim shirts and t shirts available that can go along [url=http://www.journalonline.co.uk/tory-burch-outlet.html]http://www.journalonline.co.uk/tory-burch-outlet.html[/url] Fitch only creates top quality clothes. The particular [url=http://www.journalonline.co.uk/tory-burch-outlet.html]tory burch outle[/url] juicer right after having a wholesome beverage. There have been [url=http://www.journalonline.co.uk/ralph-lauren-outlet.html]http://www.journalonline.co.uk/ralph-lauren-outlet.html[/url] apply mathematics to the game. Baldwin used probability,
jack-o-lantern unattended. There should always be supervision. [url=http://www.journalonline.co.uk/tory-burch-outlet.html]tory burch outle[/url] with these families. Tony: What is your most important legal [url=http://www.journalonline.co.uk/ralph-lauren-outlet.html]http://www.journalonline.co.uk/ralph-lauren-outlet.html[/url] terms of patterns and fabrics to choose from. Their designer [url=http://www.journalonline.co.uk/tory-burch-outlet.html]http://www.journalonline.co.uk/tory-burch-outlet.html[/url] Am I following the law? Are my records good enough? How do I