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Refraction Reflection (Results (Schermata 2020-02-21 alle 13.30.54,…
Refraction Reflection
Procedure
Start off by placing a paper protractor(protractor of +/- 0.1 degrees) underneath your glass semi-circle(make sure that the center of the protractor lies exactly in the middle of the diameter of the semi-circle)
After, place your laser a fixed circle from the semi-circle and turn it on.
After, place your laser a fixed circle from the semi-circle and turn it on.
measure on a table the angle of reflection to the nearest 0.1 degree and the angle of refraction, also to the nearest 0.1 degree.
measure on a table the angle of reflection to the nearest 0.1 degree and the angle of refraction, also to the nearest 0.1 degree.
Finally, repeat steps 3, 4, 5 a total of 5 times, to finish with 5 complete trials
Lastly, find the mean for each degree of refraction and reflection, making an average of all the different trials.
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Theory
The angle of incidence will be the exact same as the angle of reflection.
Therefore, in the graph there will be a directly proportional correlation
where one value will be the exact same as the other.
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The angle of incidence instead will have a positive nonlinear correlation with the angle of refraction when not following snell’s law.
Moreover, the sin of the angle of incidence will also have a positive non-linear correlation with the isn of the angle of refraction.
However, due to snell’s law, the coefficient of light passing through air times the sin of the angle of incidence will be equal to the coefficient of light passing through the material we use times the angle of refraction, showing a directly proportional correlation on the graph.
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Sources
Objectivity
It's objective beacause its non profit and it's an article about various experimnets performed to prove and explain the phenomenon of refraction.
Currency
Although the artcile isn't current, it's still reliable as refraction hasn't changed(the artcile was published on April 24th 2012)
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Audience/Appearence
The website appears to be professional being modern, simple with photos and diagrams of refraction.
Accuracy
It's accurate beacuse cross-checked with other website and it finishes in .org meaning it's a non-profitable organization.
Audience
there is a technical but comprehensible layout, because it was created to teach people new physics laws.
Accuracy
The site is reliable, because the URL finishes with "edu" that stands for education. Moreover, we cross check the accuracy of the website with other websites.
Authority
This website is property of the company HyperPhysics, which is created for the exploration of the environment for concepts in physics.
Currency
As it teaches physics laws, we don't need a recent update, but we know that it was presented in 2000.
Objectivity
The source is objective, because it teaches facts and there are no personal opinion.
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Accuracy
the imformation is accurate as we cross-checke dit and as it was poublished by the University of British Columbia(ends in .uba)
Audience/appearence
The appearence of the webiste is quite simple, it's mostly white with only information and diagrams dedicated to refraction.
Authority
the writer is uknown, however it is know that it was written by the 'Univerosty of British Columbia'
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Authority
The Physics Classroom was written and developed by Tom Henderson. Tom has been teaching physics and chemistry at Glenbrook South High School in Glenview, Illinois since 1989. He is a graduate of the University of Illinois where he received degrees in Chemical Engineering and Chemistry.
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Accuracy
The website is accurate as it has specific headlines and many options to search for. Explanations are well described and specific.
Audience/Appearence
The source has a simple layout as is was created to help teachers in their lessons so it has to be clear and simple to be understood also by people who don't know anything about the topic.
