14th-century painting of the assassination of Nizam al-Mulk by an assassin. The Assassins (from Persian: Ø­Ø´ÛØ´ÛØ§Ù ââ Arabic: Ø­Ø´ÙØ§Ø´ÙÙ â á¸¤ashshÄshÄ«n) is the name used to refer to the medieval Nizari Ismailis, particularly those of Persia and Syria.t is said that the Assassins are the ancestors of those given the surname Hajaly, derived from the word hajal, a rare species of bird found in the mountains of Syria near Masyaf. The hajal (bird) was often used as a symbol of the Assassin's order.
1 Use the colorimeter to measure the absorbance of the water sample and the standard solutions across a range of wavelengths. Choose a suitable wavelength for the rest of the experiments.  As a group, decide on how you will need to dilute the standard solutions.
The Pocket Detective window tint meter can be used to measure optical properties of varying materials. Pocket Detective window tint meters have been used to measure opacity or clarity of glass and plastic substrates.