1. The problem statement, all variables and given/known data I what to do a summer physics project on Kerr effect. I want to determine Kerr constant for some molecules. Problem is that i cannot get nitro-benzene and nitro-toluene. Therefor i need to do my research on some other molecules, problem is that i dont have mentor who knows something more about Kerr effect, and i literature and papers I've only found that they did research on some big organic molecules, without explanation why did they used it. I would be thankful if someone knows with what molecules i could work, or if someone could recommend some more literature on it. 2. Relevant equations 3. The attempt at a solution I have 30cm holding tank, 20kV voltage and power-meter that can detect changes of 1nW. I've try with water, but power-meter shows smaller value when electric filed is on, possibly because of electro-optic modulating properties of water ?