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The expression 4Pi may refer to. [1]

4 relations: Hermetic detector, IBM System/4 Pi, Solid angle, 4Pi microscope.

Hermetic detector

In particle physics, a hermetic detector (also called a 4π detector) is a particle detector designed to observe all possible decay products of an interaction between subatomic particles in a collider by covering as large an area around the interaction point as possible and incorporating multiple types of sub-detectors.

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IBM System/4 Pi

The IBM System/4 Pi is a family of avionics computers used, in various versions, on the F-15 Eagle fighter, E-3 Sentry, AWACS, Harpoon Missile, NASA's Skylab, MOL, and the Space Shuttle, as well as other aircraft.

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Solid angle

In geometry, a solid angle (symbol) is a measure of the amount of the field of view from some particular point that a given object covers.

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4Pi microscope

A 4Pi microscope is a laser scanning fluorescence microscope with an improved axial resolution.

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Redirects here:

4Pi (disambiguation), 4pi, .


[1] https://en.wikipedia.org/wiki/4Pi

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