Name three radiations and their wavelength range which are invisible and beyond the violet end of the
visible spectrum.

a and c

c is 100% but i am confused in a

scientific laws are the result of testing theories and proving them to be facts.

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.