phase

A solo performance of Steve Reich's Piano Phase, with one pianist playing both parts, recorded in 2004 with Reich in attendance. It is a 15-minute minimalist phasing piece.

Cleared Defense Department footage of Raytheon's Phaser high-power microwave weapon bringing down drones during a 2013 live-fire demonstration at Fort Sill. Raytheon says it has halved the payload size and is offering the system for operational use.

Professor Mike Merrifield of Nottingham explains in a mostly uncut conversation why light travels slower in glass. He treats light as a wave and describes how the material's electrons produce secondary waves that combine to slow it.

Wendover Productions explains why Boeing's efficient 787 beat Airbus's giant A380, contrasting hub-and-spoke with point-to-point routes. It covers the economics of long-haul flights.

A short animation that pairs the sound of a dialup modem handshake with a graphic explaining what each phase of the sound means.

The South Park clip in which underpants gnomes explain their three-phase business plan: collect underpants, then a question mark, then profit.