diffraction

$Through Two Doors At Once, Thomas Young, double slit experiment, wave interference, diffraction, quantum mechanics, wave function, photons, Albert Einstein, consciousness, Mach Zehnder interferometer, interferometer, Isaac Newton, Christiaan Huygens$

Book Excerpt: A Simple Test to Reveal the ‘Central Mystery’ of Quantum Physics

Anil Ananthaswamy 02/11/2018

An excerpt from the book 'Through Two Doors At...

The new PARLA laser in operation at ESO’s Paranal Observatory. The yellow-orange beam of the brilliant seven-watt laser is seen emerging from the dome of Unit Telescope 4 of the Very Large Telescope. In the background the Large Magellanic Cloud can also be seen. The laser creates an artificial star high in the atmosphere that can be used to correct images for the turbulence of the air and form much sharper pictures. Credit: European Southern Observatory, CC BY 4.0

How Could We Build an Invisibility Cloak to Hide Earth from an Alien Civilisation?

David Kipping 14/04/2016

An invisibility cloak could be a sort of insurance...