Page 5 - Jagged Edge Glass Fragment
P. 5

Teacher’s

             Notes








                   hese notes are provided to assist in the
                   preparation and execution of the laboratory     OTHER SUPPLIES AND
             Texperiment. A solutions key for the pre-lab and      EQUIPMENT REQUIRED
             post-lab questions can be found on pages 11 and 12.
                                                                    Microscope (6)

                                                                    Laboratory Gloves
               SUPPLIES                                             Safety Glasses/Goggles
               First, inventory the supplies included in the
               lab kit. Supplies have been provided for up to       Sodium Lamp or 589nm Wavelength Filter
               six groups of students.                                (Optional)

                Microscope Slides (1 Box of 72)
                Microscope Cover Slips (1 Box of 100)
                                                                 RUNNING THE LAB
                Refractive Index Liquid 1: nD=1.45              During the labs instruct students that the refractive
                  (1 Set of 6 Bottles)                           index of the item being sampled may be inferred

                Refractive Index Liquid 2: nD=1.47              from the liquids if it does not match the liquids. For
                  (1 Set of 6 Bottles)                           example, if the refractive index of the item does not

                Refractive Index Liquid 3: nD=1.49              match a liquid and is determined to be greater than
                  (1 Set of 6 Bottles)                           1.45 and less than 1.47 it may be inferred that the
                                                                 refractive index is 1.46.
                Headlight Reference Glass
                  (1 Strip of 6 Samples)

                Bottle Reference Glass                          SAFETY PRECAUTIONS
                  (1 Strip of 6 Samples)                         As this lab involves the analysis of broken glass

                Evidence Questioned Glass                       fragments, the presence of sharp edges are a
                  (1 Strip of 6 Samples)                         possibility. Extreme caution should be used when

                Evidence Known Glass                            handling broken glass and students should be
                  (1 Strip of 6 Samples)                         reminded to exercise diligence to prevent injury.
                                                                 Students should be reminded to only handle glass






                                                                          THE MYSTERY OF LYLE AND LOUISE     5
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