The Interdisciplinary Laboratory
Pre-Lab Assignment
for Experiment #7:
Synthesis and Characterization
of Liquid Crystals
Pre-Lab Assignment
for Experiment #7:
Synthesis and Characterization
of Liquid Crystals
The following data have been observed for the refractive indices of
a cholesteryl chloride - cholesteryl nonanoate mixture.
| Temperature/°C | Parallel index | Perpendicular index |
| 25 | 1.5207, 1.5209, 1.5209 | 1.4966, 1.4967, 1.4967 |
| 35 | 1.5169, 1.5168, 1.5170,1.5170 | 1.4935, 1.4933, 1.4934 |
| 50 | 1.5114, 1.5115, 1.5115 | 1.4895, 1.4895 |
| 75 | 1.4998, 1.4997, 1.4997 | 1.4845, 1.4844, 1.4844 |
Calculate the average refractive index and its standard deviation at
each temperature.
Develop an equation for the line that represents the average refractive
index as a function of temperature in the range 25 to 75 °C.
Submit via e-mail the solutions to this pre-lab assignment (identifying your responses by letter - i.e., (a), (b), etc.) to Professor Van Hecke (Gerald_VanHecke@hmc.edu) by 8 p.m. on the Monday evening prior to your first laboratory day (i.e., Monday, March 24 or Monday, April 14).