Learn about Space-time Invariance and Quantum Gravity. What significance does using Discrete Numbers (there is a smallest or shortest quantity) versus Real Numbers (where there is no smallest or shortest quantity) to measure length and time have in the observable universe. Is it time to abandon the Real Numbers in describing space-time? What is the smallest time: chronon, hodon, and space: extintion in

PowerPoint presentions used on Saturday, April 16, 2011. The first Quicktime Mov movies made by Stephanie Rose Williams, "Zeno2", while at Drexel University, the second Quicktime Mov movie "PlankLength" made by Stephanie Rose Williams Martinez, the same person, and newest Quicktime Mov movie made by Stephianie Rose Williams Marinez on this subject.

Edge of Physics a Scientific American digital publication.

What are the physical consequences to our freedom to move forward and backward in space, but only forward in time? What causes causality? Is there a cosmic censorship principle that prevents messing with time travel so you can not kill your mother before you are born? Does it even make sense to talk about time travel? How can we modify the theories of gravity so that it is no longer time inversion invariant? What does this have to do with

This was a special "World Year of Physics 2005" event commemorating Albert Einstein's wonderful creative year, Special Relativity, the Photoelectric Effect, and Brownian Motion papers where published in 1905. Though by 2015 it is hoped that this yearly event will have evolved enough to commemorate the 100 year anniversary of "General Relativity" that was invented by Albert Einstein in 1915. So we have 10 years to figure out Quantum Gravity, if we want to honor his 1915 work! Tick Tock!

Montgomery College Planetarium

Last changed 11:32AM on Friday April 12, 2013 by Dr. Harold Williams