Exploring Different Methods for Measuring Refractive Index

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Homework Help Overview

The discussion revolves around measuring the refractive index in advanced higher physics, focusing on various experimental methods. The original poster has conducted three experiments, including the standard ray lamp experiment and two versions of the apparent depth method, and is seeking additional experimental ideas.

Discussion Character

  • Exploratory, Conceptual clarification

Approaches and Questions Raised

  • Participants discuss the standard ray lamp experiment, questioning its methodology and exploring the use of prisms and lenses as alternative methods for measuring refractive index. Suggestions include using a prism to illustrate dispersion and measuring the focal length of lenses.

Discussion Status

The discussion is active, with participants offering various experimental suggestions and clarifications regarding the original poster's methods. There is no explicit consensus on a single approach, but several viable alternatives have been proposed.

Contextual Notes

The original poster expresses a preference for continuing with the rectangular prism they have already been using, indicating a constraint on changing experimental setups.

sean_cameron
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I am currently undergoing advanced higher physics and my investigation is on measuring refractive index.
I have conducted 3 experiments so far: the standard ray lamp experiment from higher and two different versions of the apparent depth method.
However, these experiments have been simple and I was looking for any advice for another experiment.
Thank you
 
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sean_cameron said:
the standard ray lamp experiment

Which is the standard one? Is that where you measure the angle of incidence and the angle of refraction?

Here's another one from HyperPhysics (great site!).

http://hyperphysics.phy-astr.gsu.edu/hbase/geoopt/prism.html#c1

From that page, "A refracting prism is a convenient geometry to illustrate dispersion and the use of the angle of minimum deviation provides a good way to measure the index of refraction of a material." So if you can get your hands on a prism then you might be in business.
 
You may also wish to try lenses.There are several ways to measure the focal length of a lens and by measuring the radius of curvature of the lens faces and then using the lens formula...1/f=(n-1)(1/r1+1/r2) you can calculate n.
 
Tom Mattson said:
Which is the standard one? Is that where you measure the angle of incidence and the angle of refraction?

Yes this is the one i was referring to.
Thanks for the help but i was hoping to stick to the same rectangular prism i have already been using, any other ideas?
 

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