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The rapatronic camera (a portmanteau of rapid action electronic) is a high-speed camera capable of recording a still image with an exposure time as brief as 10 nanoseconds. The camera was developed by Harold Edgerton in the 1940s and was first used to photograph the rapidly changing matter in nuclear explosions within milliseconds of detonation ...
Rope trick effects visible from one of Operation Tumbler–Snapper's tower-mounted test shots in 1952, taken with a rapatronic camera. The adjacent photograph shows two unusual phenomena: bright spikes projecting from the bottom of the fireball, and the peculiar mottling of the expanding fireball surface.
Both Match and Solid Pack type electric caps take a few milliseconds to fire, as the bridgewire heats up and heats the explosive to the point of detonation. Exploding bridgewire or EBW detonators use a higher voltage electric charge and a very thin bridgewire, .04 inch long, .0016 diameter, (1 mm long, 0.04 mm diameter).
20 milliseconds – cycle time for European 50 Hz AC electricity; 31.25 milliseconds – a hundred twenty-eighth note at 60 BPM; 33.367 milliseconds – the amount of time one frame lasts in 29.97 fps video (most common for NTSC-legacy formats) 41.667 milliseconds – the amount of time one frame lasts in 24 fps video (most common cinematic ...
The EBW was invented by Luis Alvarez and Lawrence Johnston for the Fat Man–type bombs of the Manhattan Project, during their work in Los Alamos National Laboratory.The Fat Man Model 1773 EBW detonators used an unusual, high reliability detonator system with two EBW "horns" attached to a single booster charge, which then fired each of the 32 explosive lens units.
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A time bomb's timing mechanism may be professionally manufactured either separately or as part of the device, or it may be improvised from an ordinary household timer such as a wind-up alarm clock, wrist watch, digital kitchen timer, or notebook computer. The timer can be programmed to count up or count down (usually the latter; as the bomb ...
Forecasts show the bomb cyclone will combine with an atmospheric river and unleash heavy rain, hurricane-force wind gusts and feet of mountain snow to parts of the Pacific Northwest and Northern ...