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muzzle flash
A muzzle flash is the visible light of a muzzle blast, which expels high temperature, high pressure gases from the muzzle of a firearm. The blast and flash are caused by the combustion products of the gunpowder, and any remaining unburned powder, mixing with the ambient air. The size and shape of the muzzle flash is dependent on the type of ammunition being used and the individual characteristics of firearm and any devices attached to the muzzle (such as a muzzle brake or flash suppressor).
==Muzzle blast==
The muzzle flash is often broken down into two components, an auditory component〔(Muzzle Blast Sound Intensity, Firearm Sound Pressure Level )〕 and a non-auditory component.〔( Blast Overpressure Studies. Nonauditory Damage Risk Assessment for Simulated Muzzle Blast from a l2Omm Ml2l Mortar System. ) (abstract)〕 The auditory component, the sound of the muzzle blast, is important because it can cause hearing loss or give away the gun's position, while the non-auditory component, the overpressure wave, can cause damage to items near the blast.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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