广岛原子弹爆发的介绍.ppt

广岛原子弹爆发的介绍

Mushroomcloud，Hiroshima----August6th1945

Thecausesofthings1945.7.26InJuly26,1945,America,BritainandtheRepublicofChinaissueda“Potsdamdeclaration（波茨坦宣言）,urgedJapantosurrender.InJuly28th,theJapanesegovernmentrefusedtoacceptthePotsdamdeclaration.Forreasonsofmilitaryandpolitical,Americangovernmentinaccordancewiththeoriginalplan,usedtheatomicbombonJapan.7月28日，日本政府拒绝接受《波茨坦宣言》。出于军事和政治原因，美国政府按照原计划，在日本使用原子弹。

ThefirstAtomicbomb,

nicknamedlittleboy----

theManhattanproject小男孩

Opticalradiation光辐射Shockwaves冲击波Nuclearradiation核辐射Electromagneticpulse电磁脉冲Radioactivecontamination放射性沾染

InHiroshima，firessprangupimmediatelyalloverthewideflatcentralareaofthecity;thesefiressooncombinedinanimmensefirestorm

In1945October

Hiroshimainruins

ThedestroyedHiroshima

Thevictims

ThedamageTherailsbent（扭曲）Thesteelcollapses（倒塌）

MultipledamagesBlast（爆破）,orpressurewave,similartothatofnormalexplosions.Primaryfires,thosefiresstartedinstantlybytheheat,radiatedfromtheatomicexplosion.Secondaryfires,resultingfromthecollapseofbuildings,damagetoelectricalsystems,overturningofstoves

Radiationinjuriescausedbytheinstantaneouspenetratingradiation(similartoexcessiveX-rayexposure)fromthenuclearexplosion;alloftheseeffectiveradiationsoccurredduringthefirstminuteafterthebeginningoftheexplosion瞬时穿透照射引起的辐射损伤（类似于过度的X射线照射）从核爆炸开始的第一分钟就对人体差生巨大的伤害.

Thesurvivingbuildings

HiroshimaPeaceMemorialParkInscribedontheMemorialCenotaph（纪念碑）inJapaneseis:“Letallthesoulshererestinpeace,forweshallnotrepeattheevil.”

Forpeace：Thistragichistoryhasleftusalargenumberofinformationtotellvisitorstheimportanceofpeace.留给世世代代后人的警醒

thereconstructionofHiroshima

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