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Dr. Tae - Building A New Culture of Teaching and Learning

Dr. Tae explains why “school sucks.”

It breaks my heart how true this video is.

14-billion-years-later:

Speed of light may have been brokenOkay guys, this one is hot off the press. I’ve only found two sources for this (here and here) that have been posted in the last hour. I have to say that I immediately doubt the validity of this, but I feel I should bring it to your attention anyway.Reports from our good friends at CERN say that they’ve observed particles traveling at faster than light speeds. For those of you who know a bit about relativity, this ain’t all that cool. The speed of light is basically meant to be the fastest speed there is, and if this wasn’t the case then we may have a major breakdown of Einstein’s theory of relativity.The scientists at CERN have concluded this based off results in which a beam of neutrinos fired from a particle accelerator in Geneva traveled 434 miles 60 nanoseconds faster than it should have. This may not sound like much, but the error was calculated at 10 nanoseconds and the scientists themselves seem fairly adamant in their results.

If this is true, then this is perhaps one of the most fascinating breakthroughs of the century. It is said that time stands still for particles traveling at the speed of light. If you slow down from the speed of light, then time moves forward. However, what happens if you travel faster than the speed of light?
Time travel.

Speed of light may have been broken

Okay guys, this one is hot off the press. I’ve only found two sources for this (here and here) that have been posted in the last hour. I have to say that I immediately doubt the validity of this, but I feel I should bring it to your attention anyway.

Reports from our good friends at CERN say that they’ve observed particles traveling at faster than light speeds. For those of you who know a bit about relativity, this ain’t all that cool. The speed of light is basically meant to be the fastest speed there is, and if this wasn’t the case then we may have a major breakdown of Einstein’s theory of relativity.

The scientists at CERN have concluded this based off results in which a beam of neutrinos fired from a particle accelerator in Geneva traveled 434 miles 60 nanoseconds faster than it should have. This may not sound like much, but the error was calculated at 10 nanoseconds and the scientists themselves seem fairly adamant in their results.

If this is true, then this is perhaps one of the most fascinating breakthroughs of the century. It is said that time stands still for particles traveling at the speed of light. If you slow down from the speed of light, then time moves forward. However, what happens if you travel faster than the speed of light?

Time travel.

Source: 14-billion-years-later

So this electron is traveling at 6.00 x 10^6 meters per second… If you were traveling in a car this fast, you wouldn’t get a ticket because nobody would be able to see who is driving. However, if you tell a police officer that you’re going to drive this fast, then you would probably get arrested, but not for speeding, for a DUI, right? Because anyone who plans to drive talking like that deserves to be taken to jail.

N. Alexander (Chabot physics instructor)

Generally when I give a take home exam I want to confirm student understanding by reproducing it at some level in a “real” class exam. That’s sound pedagogy, yo.

N. Alexander (Chabot physics instructor)