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{{ | {{Era|Forerunner|Covenant|Human|UNSC|HCW|Post}} | ||
{{ | {{SeeWikipedia}} | ||
[[File:HReach-T26BansheeGSA-EMP.jpg|250px|thumb|A Type- | [[File:HReach-T26BansheeGSA-EMP.jpg|250px|thumb|A Type-26 Banshee GSA when hit by the EMP effect of an overcharged [[plasma pistol]].]] | ||
An '''electromagnetic pulse''' ('''EMP''') is the electromagnetic radiation from an explosion (especially a [[nuclear weapon|nuclear explosion]]) or an intensely fluctuating magnetic field caused by Compton-recoil electrons and photoelectrons from photons scattered in the materials of the electronic or explosive device or in a surrounding medium. While organic tissue is unaffected, the resulting electric and magnetic fields may couple with electrical/electronic systems to produce damaging current and voltage surges. The effects are usually not noticeable beyond the blast radius unless the device is nuclear or specifically designed to produce an electromagnetic shockwave. An alternate definition is: a broadband, high-intensity, short-duration burst of electromagnetic energy. | An '''electromagnetic pulse''' ('''EMP''') is the electromagnetic radiation from an explosion (especially a [[nuclear weapon|nuclear explosion]]) or an intensely fluctuating magnetic field caused by Compton-recoil electrons and photoelectrons from photons scattered in the materials of the electronic or explosive device or in a surrounding medium. While organic tissue is unaffected, the resulting electric and magnetic fields may couple with electrical/electronic systems to produce damaging current and voltage surges. The effects are usually not noticeable beyond the blast radius unless the device is nuclear or specifically designed to produce an electromagnetic shockwave. An alternate definition is: a broadband, high-intensity, short-duration burst of electromagnetic energy. | ||
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==Notable examples== | ==Notable examples== | ||
There have been several noteworthy instances in which an EMP has appeared. | There have been several noteworthy instances in which an EMP has appeared. | ||
*The detonation of a [[nuclear weapon]], such as a [[Shiva-class nuclear missile]], is almost always followed by a massive electromagnetic pulse.<ref>'''[[Halo: The Cole Protocol]]''', ''page 317''</ref> | *The detonation of a [[nuclear weapon]], such as a [[Shiva-class nuclear missile]], is almost always followed by a massive electromagnetic pulse.<ref>'''[[Halo: The Cole Protocol]]''', ''page 317''</ref> | ||
*In the aftermath of [[Operation: UPPER CUT]], both [[SPARTAN-B312]] and the satellite [[Navigation Beacon RA-15]] witnessed a purple-tinted EMP cloud emanate from the wreckage of the [[Covenant supercarrier]] ''[[Long Night of Solace]]'' after the improvised slipspace bomb was activated. The cloud disabled all electronics within its vicinity, including the NAV Beacon.<ref>'''[[Halo: Reach]]''', campaign level, ''[[Long Night of Solace (level)|Long Night of Solace]]''</ref> | |||
*In the aftermath of [[Operation: UPPER CUT]], both [[SPARTAN-B312]] and the satellite [[Navigation Beacon RA-15]] witnessed a purple-tinted EMP cloud emanate from the wreckage of the [[Covenant]] | |||
*During the [[Battle of Installation 04]], [[Cortana]] diverted [[John-117]]'s [[energy shielding|energy shields]] into an EMP to disable [[Installation 04|Halo's]] [[phase pulse generator]]s.<ref>'''[[Halo: Combat Evolved]]''', campaign level ''[[Two Betrayals]]''</ref> | *During the [[Battle of Installation 04]], [[Cortana]] diverted [[John-117]]'s [[energy shielding|energy shields]] into an EMP to disable [[Installation 04|Halo's]] [[phase pulse generator]]s.<ref>'''[[Halo: Combat Evolved]]''', campaign level ''[[Two Betrayals]]''</ref> | ||
*The [[deep-space artifact]] let out an enormous electromagnetic pulse that briefly canceled out all communications in the [[Sol system]]. It later let out another pulse upon deactivation. | *The [[deep-space artifact]] let out an enormous electromagnetic pulse that briefly canceled out all communications in the [[Sol system]]. It later let out another pulse upon deactivation. | ||
*During the [[Skirmish over Threshold]], [[John-117]] used the EMP emitted by a [[ | *During the [[Skirmish over Threshold]], [[John-117]] used the EMP emitted by a [[Type-1 plasma grenade]] to disable the electronics of a locked door on ''[[Ascendant Justice]]'', which allowed him to open the door.<ref>'''[[Halo: First Strike]]''', ''page 89''</ref> | ||
*The in-atmosphere jumping of the ''[[Solemn Penance]]'' to [[Slipstream space|slipspace]] above [[New Mombasa]] created a massive electromagnetic pulse that damaged electrical systems in the city, and fried the navigational and safety systems of nearly five dozen [[Single Occupant Exoatmospheric Insertion Vehicle|SOEIV]] pods unfortunate enough to | *The in-atmosphere jumping of the ''[[Solemn Penance]]'' to [[Slipstream space|slipspace]] above [[New Mombasa]] created a massive electromagnetic pulse that damaged electrical systems in the city, and fried the navigational and safety systems of nearly five dozen [[Single Occupant Exoatmospheric Insertion Vehicle|SOEIV]] pods unfortunate enough to drop into the city at that exact moment, plunging them and the [[Orbital Drop Shock Trooper]]s inside free-falling to near-certain death.<ref>'''[[Halo 3: ODST]]''', campaign level, ''[[Prepare to Drop]]''</ref> | ||
*The {{UNSCShip|Port Stanley}} was equipped with an [[ | *The {{UNSCShip|Port Stanley}} was equipped with an [[Electromagnetic pulse cannon|EMP cannon]], for disabling ships not hardened against it, which it used against the {{Class|Hudal|auxiliary vessel}} ''[[Piety]]''.<ref>'''[[Halo: Glasslands]]''', ''page 224''</ref> | ||
*While trying to stop the [[Ur-Didact|Didact]], [[Cortana]] again modified the Master Chief's shields to give off an EMP to disable a carrier wave generator. She referred to it as "taking a page out of our old playbook."<ref>'''[[Halo 4]]''', campaign level ''[[Shutdown]]''</ref> | *While trying to stop the [[Ur-Didact|Didact]], [[Cortana]] again modified the Master Chief's shields to give off an EMP to disable a carrier wave generator. She referred to it as "taking a page out of our old playbook."<ref>'''[[Halo 4]]''', campaign level, ''[[Shutdown]]''</ref> | ||
===Gameplay=== | ===Gameplay=== | ||
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*In ''[[Halo 2]]'', the [[Sentinel]]s sometimes emit an EMP when destroyed. This effect disables shields, but vehicles are unaffected. | *In ''[[Halo 2]]'', the [[Sentinel]]s sometimes emit an EMP when destroyed. This effect disables shields, but vehicles are unaffected. | ||
*In '' | *In ''Halo 3'', the [[power drain]] uses EMP to disable shields, vehicles and other power sources. | ||
* | *A charged [[Type-25 Directed Energy Pistol|Plasma Pistol]] blast will temporarily disable vehicles and energy shields much like the power drain. | ||
*In '' | *In ''Halo Wars'', [[Ellen Anders|Professor Anders]]' vehicle, the [[Gremlin Combat Support Vehicle|Gremlin]], uses EMP as main armament to disable enemy non-infantry units. | ||
*In '' | *In ''Halo Wars'', the [[Vampire]]'s [[stasis cannon]] uses EMP as well to drain power from enemy aircraft. | ||
*In '' | *In ''Halo: Reach'', [[Armor lock|Armor Lock]] can trigger an EMP after use, which can take out a Spartan's shields. Combined with a quick and accurate melee, this can result in an almost instant kill. | ||
*In '' | *In ''Halo: Reach'' the [[M319 Individual Grenade Launcher]] has a secondary function that acts like an EMP. It awards a player an [[EMP Kill Medal|EMP Blast Medal]] when it kills an enemy, being the only other weapon in the game that awards the medal. | ||
==Trivia== | ==Trivia== | ||
*If you disable a vehicle using an EMP, it will show an animation of some sparks flying around, but if you disable it again before it is drivable then the animation will stop and the vehicle will not work. | *If you disable a vehicle using an EMP, it will show an animation of some sparks flying around, but if you disable it again before it is drivable then the animation will stop and the vehicle will not work. | ||
*''Some'' vehicles disabled by an EMP will still have full functionality of its weapons if it has any. For example, if | *''Some'' vehicles disabled by an EMP will still have full functionality of its weapons if it has any. For example, if a [[M12 Force Application Vehicle|Warthog]] is disabled by an EMP, the turret will still be able to turn around and shoot. Likewise, a [[Banshee]], while grounded, will still be able to boost and perform tricks. | ||
==Gallery== | ==Gallery== | ||
<gallery> | <gallery> | ||
File: | File:EMP_Pulse.jpg|An EMP from a [[Type-25 Directed Energy Pistol|Plasma Pistol]] overcharge hits a [[SPARTAN-III Program|Spartan III]] in the ''[[Halo: Reach]] Beta''. | ||
File:EMP.jpg|Another devastating EMP charge from the [[Type-25 Directed Energy Pistol|Plasma Pistol]] in the ''Beta''. | |||
File:Armor_Lock_EMP_Pulse.jpg|An EMP wave from the Armor Lock ability can disrupt nearby enemy shields. | |||
File:EMP.jpg|Another devastating EMP charge from the | File:Plasma_EMP_Wraith.jpg|The [[Type-25 Directed Energy Pistol|Plasma Pistol]]'s AOE secondary charge function emits an EMP burst to deactivate a Covenant [[Type-26 Assault Gun Carriage|Wraith]] tank for a short period of time. | ||
File:Armor_Lock_EMP_Pulse.jpg|An EMP wave from the Armor Lock ability can disrupt nearby enemy shields | File:1249522072-Snap28.png|The [[EMP Kill Medal]] given to a player in ''[[Halo 3: ODST]]'' and in ''[[Halo 3]]'' when killing an enemy shortly after their shields are deactivated. | ||
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</gallery> | </gallery> | ||
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*''[[Halo 4]]'' | *''[[Halo 4]]'' | ||
**''[[Spartan Ops]]'' | **''[[Spartan Ops]]'' | ||
*''[[Halo: Spartan Assault]]'' | *''[[Halo: Spartan Assault]]'' | ||
*''[[Halo 2 | *''[[Halo 2 Anniversary]]'' | ||
*''[[Halo: Spartan Strike]]'' | *''[[Halo: Spartan Strike]]'' | ||
==Sources== | ==Sources== | ||
<references/> | |||
[[Category:Physics]] | [[Category:Physics]] |