How a Crookes radiometer works

A Crookes radiometer is driven by a thermal gas effect, and not "light pressure" as often thought. Ben Krasnow demonstrates the radiometer in a vacuum chamber and explain its optimal running pressure.

 

Brian Cox visits the world's biggest vacuum chamber

Human Universe: Episode 4 Preview - BBC Two

Programme website: http://www.bbc.co.uk/programmes/p0276q28

Brian Cox visits NASA’s Space Power Facility in Ohio to see what happens when a bowling ball and a feather are dropped together under the conditions of outer space.

Nima Arkani-Hamed Public Lecture: Quantum Mechanics and Spacetime in the 21st Century

Dr. Nima Arkani-Hamed (Perimeter Institute and Institute for Advanced Study) delivers the second lecture of the 2014/15 Perimeter Institute Public Lecture Series, in Waterloo, Ontario, Canada.

Held at Perimeter Institute and webcast live worldwide on Nov. 6, 2014, Arkani-Hamed's lecture explores the exciting concepts of quantum mechanics and spacetime, and how our evolving understanding of their importance in fundamental physics will shape the field in the 21st Century.

Perimeter Institute Public Lectures are held in the first week of each month.

More information on Perimeter Public Lectures: http://ow.ly/DCYPc

 

If matter falls down, does antimatter fall up? - Chloé Malbrunot

Like positive and negative, or debit and credit, matter and antimatter are equal and opposite. So if matter falls down, does antimatter fall up? Chloé Malbrunot investigates that question by placing two atoms — one made of matter, and the other antimatter — in the cockpit of a plane, ready to jump. What do you think will happen?

 

The Big Bang Theory

The Big Bang is the name of the most respected theory of the creation of the universe. Basically, the theory says that the universe was once smaller and denser and has been expending for eons. One common misconception is that the Big Bang theory says something about the instant that set the expansion into motion, however this isn’t true. In this video, Fermilab’s Dr. Don Lincoln tells about the Big Bang theory and sketches some speculative ideas about what caused the universe to come into existence.