Measuring refractive index of water

AI Thread Summary
To measure the refractive index of water, using a refractometer is recommended, but it may not be accessible to everyone due to cost. For educational experiments, Total Internal Reflection offers a practical alternative that utilizes common equipment. Resources like HyperPhysics can provide guidance on conducting simple and cost-effective experiments. The discussion emphasizes the need for accessible methods in educational settings. Overall, exploring alternative techniques can yield effective results without specialized tools.
Daisy
Messages
12
Reaction score
0
Does anyone know any good experimental techniques of measuring refractive index of water?
 
Science news on Phys.org
M Quack said:
Not very helpful if you 1. Haven't got one, 2. Can't afford one.

If this is a school type of experiment that you're after then using Total Internal Reflection is a good approach because you can use readily available equipment. You might find this hyper physics link gives you an idea for a simple and cheap experiment.
 
Not very helpful maybe, but given the level of detail in the op...
 
Thread 'A quartet of epi-illumination methods'
Well, it took almost 20 years (!!!), but I finally obtained a set of epi-phase microscope objectives (Zeiss). The principles of epi-phase contrast is nearly identical to transillumination phase contrast, but the phase ring is a 1/8 wave retarder rather than a 1/4 wave retarder (because with epi-illumination, the light passes through the ring twice). This method was popular only for a very short period of time before epi-DIC (differential interference contrast) became widely available. So...
I am currently undertaking a research internship where I am modelling the heating of silicon wafers with a 515 nm femtosecond laser. In order to increase the absorption of the laser into the oxide layer on top of the wafer it was suggested we use gold nanoparticles. I was tasked with modelling the optical properties of a 5nm gold nanoparticle, in particular the absorption cross section, using COMSOL Multiphysics. My model seems to be getting correct values for the absorption coefficient and...
Back
Top