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Fire Investigation mainly refers to the origin and cause investigation of fire it is primarily the analysis of fire-related incidents. After fire extinguishers or firefighters extinguish a fire, an investigation is thereby launched to determine the origin along with the cause of the explosion and fire. Investigations into such incidents demand a systematic approach and knowledge of fundamentals of fire science.
Forensic science (is a transformative cycle, Forensic Science Under the Microscope) is an application of a broader spectrum of sciences to answer queries of interest to a legal system. This might be in relation to any criminal or any civil action. The word forensic is a derivation from the Latin adjective forensic, meaning "before or of the forum." In Romans times, a criminal charge would have meant presenting the case before a certain group of public individuals in the forum. Both the accused and the accuser would give speeches of their sides of the story. The individual one with the best argument and delivery would have won the case. In modern use, the term "forensics" is closely associated with a scientific field that is the word "forensics" is used with "forensic science".
Fire investigation also referred at times as the origin and cause investigation study is the examination of fire-related incidents. It starts up once the fire is extinguished with the objective of piecing everything together to find out the real causes, bits of fire.