How much more do you want to know? You have the wall lowering at exactly k = sin(θ) so the light appears instantly on the ground from the 55 foot mark to the 27.5 foot “destination”. If you increase k further, the denominator will become negative, suggesting the velocity of the shadow will now reverse. […]
July 28, 2013 Leave a Comment
July 28, 2013 Leave a Comment
The Speed of Darkness: Singularities (Part 2 of 3)
If you’ve stumbled here in your search for the Speed of Darkness Series, I encourage you to first read Part 1 of this series, The Speed of Darkness. So, shadows traveling faster than the speed of light are one thing, singularities in equations are quite another. First, I should put some specifics on this situation for […]
July 28, 2013 Leave a Comment
The Speed of Darkness Series: Part 1 of 3
There is a general misunderstanding about Nature’s speed limit. It is often asserted that nothing can travel faster than the speed of light in a vacuum. This is incorrect. There are several easily measurable things that can move much faster than the speed of light. One class of such things is shadows, more precisely, the […]
June 20, 2013 Leave a Comment
Demote Indigo
I’ve been thinking about the rainbow, and it’s not clear to me that indigo should have its own band. It should be demoted, much like Pluto was demoted from being a planet. Don’t get me wrong, I’m not saying indigo isn’t a color in the rainbow, or that The Indigo Girls shouldn’t have a band. […]