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.
Back to Top. A Light meter is a device which is used for the measurement of amount of light. One of the most important uses of light meter is in Photography.In Photography, it is used to find proper exposure of light.