Is it possible to find refractive index from diffraction?

In summary, the conversation discusses finding the refractive index of nylon (fishing line) by observing diffraction patterns with a laser. The speaker mentions being able to find the diffraction, but not knowing how to calculate after that. They also suggest comparing the patterns obtained with those from a steel wire and a slit of the same thickness.
  • #1
JessicasPhysicsLife
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Homework Statement


I am trying to find the refractive index nylon (fishing line) , however when I used a laser onto the fishing line (nylon) it looked like it diffracted.

Homework Equations


I am able to find the diffraction if that was what it was showing, however I don't know how to calculate after that.

https://www.dropbox.com/s/k083dkj18xcdgro/CIMG3662.JPG?dl=0
https://www.dropbox.com/s/nq0d2iwd2kjem74/CIMG3664.JPG?dl=0
https://www.dropbox.com/s/ew0ys9dfqa1f4ol/CIMG3665.JPG?dl=0
https://www.dropbox.com/s/vs4nieam2yxy1t7/CIMG3666.JPG?dl=0
 
Last edited:
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  • #2
Nice shots ! Hello JPL, :welcome:

As an experimentalist, I would compare the patterns you obtained with
  1. the pattern you get from a steel wire (or otherwise opaque wire) with same thickness
  2. the pattern you get with a slit as wide as the wire is thick
 

What is refractive index?

Refractive index is a measure of how much a material bends light as it passes through it. It is the ratio of the speed of light in a vacuum to the speed of light in the material.

What is diffraction?

Diffraction is the bending or spreading of light as it passes through an opening or around an obstacle. It is caused by the interference of light waves.

Can refractive index be measured from diffraction?

Yes, it is possible to find the refractive index of a material by studying the diffraction of light passing through it. By analyzing the diffraction pattern, scientists can determine the refractive index of the material.

What equipment is needed to find refractive index from diffraction?

To find refractive index from diffraction, one would need a light source, a diffraction grating, and a measuring device such as a ruler or protractor. Advanced equipment such as a spectrometer or interferometer may also be used.

Are there any limitations to finding refractive index from diffraction?

There are some limitations to finding refractive index from diffraction. The material being studied must be transparent and the diffraction pattern must be clearly visible. Additionally, the accuracy of the measurement may be affected by the wavelength of light used and the quality of the diffraction grating.

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