విస్ఫోటం: కూర్పుల మధ్య తేడాలు

{{విస్తరణ}}

[[Image:Explosions.jpg|right|thumb|250px|[[Gasoline]] explosions, simulating [[bomb]] drops at an [[airshow]].]]

 

 

Explosions can occur in nature. Most natural explosions arise from [[volcano|volcanic]] processes of various sorts. Explosive volcanic eruptions occur when [[magma]] rising from below has much dissolved gas in it; the reduction of [[pressure]] as the magma rises causes the gas to bubble out of solution, resulting in a rapid increase in volume. Explosions also occur as a result of [[impact event]]s.

 

The most common artificial [[Explosive material|explosives]] are [[chemical]] explosives, usually involving a rapid and violent [[oxidation]] reaction that produces large amounts of hot gas. [[Gunpowder]] was the first explosive to be discovered and put to use. Other notable early developments in chemical explosive technology were [[Frederick Augustus Abel]]'s development of [[nitrocellulose]] in [[1865]] and [[Alfred Nobel]]'s invention of [[dynamite]] in [[1866]].

 

A nuclear weapon is a type of explosive weapon that derives its destructive force from the nuclear reaction of fission or from a combination of fission and fusion. As a result, even a nuclear weapon with a small yield is significantly more powerful than the largest conventional explosives available, with a single weapon capable of destroying an entire city.

 

A high current electrical fault can create an ''electrical explosion'' by forming a high energy [[electric arc|electrical arc]] which rapidly vaporizes metal and insulation material. Also, excessive [[magnetic pressure]] within an ultra-strong [[electromagnet]] can cause a ''magnetic explosion''.

 

[[Solar flare]]s are an example of explosion common on the [[Sun]], and presumably on most other [[star]]s as well. The energy source for solar flare activity comes from the tangling of [[magnetic field]] lines resulting from the rotation of the Sun's conductive [[Plasma (physics)|plasma]].

 

Strictly a physical process, as opposed to chemical or nuclear, eg, a the bursting of a sealed or partially-sealed container under internal pressure is often referred to as a 'mechanical explosion'. Examples include an overheated boiler or a simple tin can of beans tossed into a fire. A [[BLEVE]] (see above) is one type of mechanical explosion, but depending on the contents of the container, the effects can be dramatically more serious - consider a propane tank in the midst of a fire. In such a case, to the limited effects of the simple mechanical explosion when the tank fails are added the chemical explosion resulting from the released (initially liquid and then almost instanteaously gaseous) propane in the presence of an ignition source. For this reason, emergency workers often differentiate between the two events.