Q.E 17

• FIELD OF VIEW – Refers to the area of the specimen that can be seen after it is magnified.
• Sensitivity – minimum detectable amount of sample.
• Selectivity – distinguishing property by differentiating one substance from another
• Objective lens – the lower lens where the object to be magnified is placed. It forms a real, inverted and magnified

  image.
• Eyepiece lens – the inverted magnified object from objective lens is viewed through this upper lens which further

  magnifying it into a virtual image
• Explosives – any chemical compound or mixture that undergo rapid burning or decomposition by influenced of heat
• TROJAN WAR – The oldest known recorded explosives in history are the Greek fire
• High Explosives (detonating charges) – the speed of its detonation wave equal to 1000 m/s and pressure equal to

  thousands of atmospheres.
• Primary – used to start explosion
• Secondary – stable but can be detonated by primary explosives
• Low Explosives (deflagrating charge) – the rate of decomposition are relatively slow process and the wave produced is

  less than the speed of sound.
• Primer – use to propel ammunitions
• Igniter – use to initiate explosions (e.g. safety fuse)
• Propellant – use to launch rockets and missile
• Grenades – derived from Greek word “Grabatus” as implied by the Spanish in 16th century. Granada
• Fuses – use to initiate explosive in any war hood (part of missile)
• Filler – the chemical or explosive substance in the grenade body.
• Body – this contains the filler and provides fragmentation
• Fuze Assembly – heart of then grenade function to give chain reaction of chemical, mechanical or electrical action
• Explosion – is a violent bursting or expansion caused by the release of the mechanical, chemical, or nuclear energy from

  a confined area