1. The problem statement, all variables and given/known data I was wondering if anyone knew of an equation or table that I could compare my labs measured speed of light to? I'm aware that the index of refraction is 1.000293 at 1 atm and 0°c but was hoping to find a way to check our values specifically. We ended up with 1.0002343 so I know we were close. thanks for the help!